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77-656: The Columbia River Gorge is a canyon of the Columbia River in the Pacific Northwest of the United States. Up to 4,000 feet (1,200 m) deep, the canyon stretches for over eighty miles (130 km) as the river winds westward through the Cascade Range , forming the boundary between the state of Washington to the north and Oregon to the south. Extending roughly from the confluence of

154-522: A 4,432-acre (1,794 ha) area located on both sides of the river. In fall 2017, the Eagle Creek Fire burned in the gorge for three months, consuming almost 50,000 acres (78 sq mi; 200 km). It reached 100% containment on November 30, 2017, but was not yet completely out. 45°42′17″N 121°47′30″W  /  45.70472°N 121.79167°W  / 45.70472; -121.79167 Canyon A canyon may also refer to

231-818: A bike. The bicycle has been used as a method of reconnaissance as well as transporting soldiers and supplies to combat zones. In this it has taken over many of the functions of horses in warfare . In the Second Boer War , both sides used bicycles for scouting. In World War I, France, Germany, Australia and New Zealand used bicycles to move troops. In its 1937 invasion of China, Japan employed some 50,000 bicycle troops, and similar forces were instrumental in Japan's march or "roll" through Malaya in World War II . Germany used bicycles again in World War II, while

308-651: A certain number of rest stops that usually include refreshments, first aid and maintenance tools. Routes can vary by as much as 100 miles (160 km). Some organized rides are entirely social events. One example is the monthly San Jose Bike Party which can reach attendance of one to two thousand riders in Summer months. Mountain biking began in the 1970s, originally as a downhill sport, practised on customized cruiser bicycles around Mount Tamalpais . Most mountain biking takes place on dirt roads, trails and in purpose-built parks. Downhill mountain biking has just evolved in

385-627: A collision. There is also some debate about the safety of the various types of separated facilities. Bicycles are considered a sustainable mode of transport, especially suited for urban use and relatively shorter distances when used for transport (compared to recreation). Case studies and good practices (from European cities and some worldwide examples) that promote and stimulate this kind of functional cycling in cities can be found at Eltis , Europe's portal for local transport. A number of cities, including Paris, London and Barcelona , now have successful bike hire schemes designed to help people cycle in

462-851: A commercial activity, mainly to transport goods, mostly accomplished in an urban environment . The postal services of many countries have long relied on bicycles. The British Royal Mail first started using bicycles in 1880; now bicycle delivery fleets include 37,000 in the UK, 25,700 in Germany, 10,500 in Hungary and 7000 in Sweden. In Australia, Australia Post has also reintroduced bicycle postal deliveries on some routes due to an inability to recruit sufficient licensed riders willing to use their uncomfortable motorbikes. The London Ambulance Service has recently introduced bicycling paramedics , who can often get to

539-535: A dramatic change in scenery while driving along Interstate 84 . In the western, temperate rainforest areas, forests are marked by bigleaf maples , Douglas fir , and western hemlock , all covered in epiphytes . In the transition zone (between Hood River and The Dalles), vegetation turns to Oregon white oak , ponderosa pine , and cottonwood . At the eastern end, the forests make way for expansive grasslands , with occasional pockets of lodgepole and ponderosa pine. Atmospheric pressure differentials east and west of

616-404: A legal race bike cannot weigh less than 6.8 kg (14.99 lbs). Being measured for a bike and taking it for a test ride are recommended before buying. The drivetrain components of the bike should also be considered. A middle grade dérailleur is sufficient for a beginner, although many utility bikes are equipped with hub gears . If the rider plans a significant amount of hillclimbing ,

693-402: A rider to ride against the clock. Time trials can be performed as a team or as a single rider. Bikes are changed for time trial races, using aero bars . In the past decade, mountain bike racing has also reached international popularity and is even an Olympic sport. Professional racing organizations place limitations on the bicycles that can be used in the races that they sanction. For example,

770-843: A rift between two mountain peaks, such as those in ranges including the Rocky Mountains , the Alps , the Himalayas or the Andes . Usually, a river or stream carves out such splits between mountains. Examples of mountain-type canyons are Provo Canyon in Utah or Yosemite Valley in California's Sierra Nevada . Canyons within mountains, or gorges that have an opening on only one side, are called box canyons. Slot canyons are very narrow canyons that often have smooth walls. Steep-sided valleys in

847-607: A surge in popularity in the US, with some vendors reporting that they were sold out of bikes under US$ 1000. The Marching and Cycling Band HHK from Haarlem (the Netherlands) is one of the few marching bands around the world which also performs on bicycles. Shortly after the introduction of bicycles, competitions developed independently in many parts of the world. Early races involving boneshaker style bicycles were predictably fraught with injuries. Large races became popular during

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924-443: A triple-chainrings crankset gear system may be preferred. Otherwise, the relatively lighter, simpler, and less expensive double chainring is preferred, even on high-end race bikes. Much simpler fixed wheel bikes are also available. Many road bikes, along with mountain bikes, include clipless pedals to which special shoes attach, via a cleat , enabling the rider to pull on the pedals as well as push. Other possible accessories for

1001-411: Is a recurring complaint by cyclists from cities with low modal share of cycling. Extensive cycling infrastructure may be found in some cities. Such dedicated paths in some cities often have to be shared with in-line skaters, scooters, skateboarders, and pedestrians. Dedicated cycling infrastructure is treated differently in the law of every jurisdiction, including the question of liability of users in

1078-419: Is about advocating the bicycle as an alternative mode of transport, and another is about the creation of conditions to permit and/or encourage bicycle use, both for utility and recreational cycling. Although the first emphasizes the potential for energy and resource conservation and health benefits gained from cycling versus automobile use, is relatively undisputed, the second is the subject of much debate. It

1155-579: Is actually 1 km wider than the Grand Canyon, making it the widest canyon in the world. Some canyons have notable cultural significance. Evidence of archaic humans has been discovered in Africa's Olduvai Gorge . In the southwestern United States, canyons are important archeologically because of the many cliff-dwellings built in such areas, largely by the ancient Pueblo people who were their first inhabitants. The following list contains only

1232-484: Is advisable to reduce the risk from motor vehicle users. Items legally required in some jurisdictions, or voluntarily adopted for safety reasons, include bicycle helmets , generator or battery operated lights, reflectors , and audible signalling devices such as a bell or horn. Extras include studded tires and a bicycle computer . Bikes can also be heavily customized, with different seat designs and handle bars, for example. Gears can also be customized to better suit

1309-440: Is generally agreed that improved local and inter-city rail services and other methods of mass transportation (including greater provision for cycle carriage on such services) create conditions to encourage bicycle use. However, there are different opinions on the role of various types of cycling infrastructure in building bicycle-friendly cities and roads. Some bicycle activists (including some traffic management advisers) seek

1386-738: Is known for its high concentration of waterfalls , with over 90 on the Oregon side of the gorge alone. Many are along the Historic Columbia River Highway , including the notable 620-foot-high (190 m) Multnomah Falls . Trails and day use sites are maintained by the Forest Service and many Oregon and Washington state parks . The Columbia River Gorge began forming as far back as the Miocene (roughly 17 to 12 million years ago), and continued to take shape through

1463-676: Is occasionally used in the United Kingdom . In South Africa, kloof (in Krantzkloof Nature Reserve ) is used along with canyon (as in Blyde River Canyon ) and gorge (in Oribi Gorge ). Most canyons were formed by a process of long-time erosion from a plateau or table-land level. The cliffs form because harder rock strata that are resistant to erosion and weathering remain exposed on

1540-599: Is similarly imprecise, especially if one includes mountain canyons, as well as canyons cut through relatively flat plateaus (which have a somewhat well-defined rim elevation). The Yarlung Tsangpo Grand Canyon (or Tsangpo Canyon), along the Yarlung Tsangpo River in Tibet , is regarded by some as the deepest canyon on Earth at 5,500 metres (18,000 ft). It is slightly longer than the Grand Canyon in

1617-598: Is soluble to a certain extent, cave systems form in the rock. When a cave system collapses, a canyon is left, as in the Mendip Hills in Somerset and Yorkshire Dales in Yorkshire , England. A box canyon is a small canyon that is generally shorter and narrower than a river canyon, with steep walls on three sides, allowing access and egress only through the mouth of the canyon. Box canyons were frequently used in

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1694-644: Is the Fish River Canyon in Namibia . In August 2013, the discovery of Greenland 's Grand Canyon was reported, based on the analysis of data from Operation IceBridge . It is located under an ice sheet. At 750 kilometres (470 mi) long, it is believed to be the longest canyon in the world. Despite not being quite as deep or long as the Grand Canyon, the Capertee Valley in Australia

1771-566: Is the Tour de France . This began in 1903, and continues to capture the attention of the sporting world. In 1899, Charles Minthorn Murphy became the first man to ride his bicycle a mile in under a minute (hence his nickname, Mile-a-Minute Murphy), which he did by drafting a locomotive at New York 's Long Island . As the bicycle evolved its various forms, different racing formats developed. Road races may involve both team and individual competition, and are contested in various ways. They range from

1848-620: Is the inequity in where safe bicycling infrastructure exists by neighbourhood, which is interpreted as a form of classism within cycling and urbanism . The bicycle has acted as a means for women's liberation and thus has links to feminism . Cyclists form associations, both for specific interests (trails development, road maintenance, bike maintenance, urban design, racing clubs, touring clubs, etc.) and for more global goals ( energy conservation , pollution reduction, promotion of fitness). Some bicycle clubs and national associations became prominent advocates for improvements to roads and highways. In

1925-534: The Folsom and Marmes people, who crossed the Bering land bridge from Asia , were found in archaeological digs . Excavations near Celilo Falls , a few miles east of The Dalles , show humans have occupied this salmon -fishing site for more than 10,000 years. The gorge has provided a transportation corridor for thousands of years. Native Americans would travel through the gorge to trade at Celilo Falls, both along

2002-588: The League of American Bicyclists . Beyond simply riding, another skill is riding efficiently and safely in traffic. One popular approach to riding in motor vehicle traffic is vehicular cycling , occupying road space as car does. Alternately, in countries such as Denmark and the Netherlands, where cycling is popular, cyclists are often segregated into bike lanes at the side of, or more often separate from, main highways and roads. Many primary schools participate in

2079-620: The Pleistocene (2 million to 700,000 years ago). During this period the Cascade Range was forming, which slowly moved the Columbia River's delta about 100 miles (160 km) north to its current location. Although the river slowly eroded the land over this period of time, the most drastic changes took place at the end of the last ice age when the Missoula Floods cut the steep, dramatic walls that exist today, flooding

2156-461: The United States , place names generally use canyon in the southwest (due to their proximity to Spanish-speaking Mexico ) and gorge in the northeast (which is closer to French Canada ), with the rest of the country graduating between these two according to geography. In Canada , a gorge is usually narrow while a ravine is more open and often wooded. The military-derived word defile

2233-419: The gluteus maximus ) and reducing air resistance at high speed. Road bikes are designed for speed and efficiency on paved roads. They are characterized by their lightweight frames, skinny tires, drop handlebars, and narrow saddles. Road bikes are ideal for racing, long-distance riding, and fitness training. Other common types of bikes include gravel bikes , designed for use on gravel roads or trails, but with

2310-642: The seabed of the continental slope are referred to as submarine canyons . Unlike canyons on land, submarine canyons are thought to be formed by turbidity currents and landslides . The word canyon is Spanish in origin ( cañón , pronounced [kaˈɲon] ), with the same meaning. The word canyon is generally used in North America , while the words gorge and ravine (French in origin) are used in Europe and Oceania , though gorge and ravine are also used in some parts of North America. In

2387-460: The western United States as convenient corrals, with their entrances fenced. The definition of "largest canyon" is imprecise, because a canyon can be large by its depth, its length, or the total area of the canyon system. Also, the inaccessibility of the major canyons in the Himalaya contributes to their not being regarded as candidates for the biggest canyon. The definition of "deepest canyon"

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2464-590: The 1890s "Golden Age of Cycling", with events across Europe, and in the U.S. and Japan as well. At one point, almost every major city in the US had a velodrome or two for track racing events, however since the middle of the 20th century cycling has become a minority sport in the US whilst in Continental Europe it continues to be a major sport, particularly in the United Kingdom, France, Belgium, Italy and Spain. The most famous of all bicycle races

2541-635: The British employed airborne "Cycle-commandos" with folding bikes . In the Vietnam War , communist forces used bicycles extensively as cargo carriers along the Ho Chi Minh Trail . The last country known to maintain a regiment of bicycle troops was Switzerland, which disbanded its last unit in 2003. In many countries, the most commonly used vehicle for road transport is a utility bicycle . These have frames with relaxed geometry, protecting

2618-529: The Cascades create a wind tunnel effect in the deep cut of the gorge, generating 35-mile-per-hour (56 km/h) winds that make it a popular windsurfing and kiteboarding location. It also creates the right conditions for snow and ice storms during the winter months which also draw very cold east winds toward the mouth of the gorge on the west end. The gorge is a popular destination for hiking , biking , sightseeing , fishing , and water sports . The area

2695-784: The Columbia with the Deschutes River (and the towns of Roosevelt, Washington , and Arlington, Oregon ) in the east down to the eastern reaches of the Portland metropolitan area , the water gap furnishes the only navigable route through the Cascades and the only water connection between the Columbia Plateau and the Pacific Ocean . It is thus that the routes of Interstate 84 , U.S. Route 30 , Washington State Route 14 , and railroad tracks on both sides run through

2772-577: The Oregon shore. Until 1997, Amtrak's Pioneer also used the Union Pacific tracks. The Portland segment of the Empire Builder uses the BNSF tracks that pass through the gorge. The Columbia River Highway , built in the early 20th century, was the first major paved highway in the Pacific Northwest . Shipping was greatly simplified after Bonneville Dam and The Dalles Dam submerged

2849-474: The UK and North America, as their first jobs, generations of teenagers have worked at delivering newspapers by bicycle. London has many delivery companies that use bicycles with trailers. Most cities in the West, and many outside it, support a sizeable and visible industry of cycle couriers who deliver documents and small packages. In India, many of Mumbai's Dabbawalas use bicycles to deliver home cooked lunches to

2926-611: The Union Cycliste Internationale, the governing body of international cycle sport (which sanctions races such as the Tour de France), decided in the late 1990s to create additional rules which prohibit racing bicycles weighing less than 6.8 kilograms (14.96 pounds). The UCI rules also effectively ban some bicycle frame innovations (such as the recumbent bicycle ) by requiring a double triangle structure. Many broad and correlated themes run in bicycle activism: one

3003-572: The United States, the League of American Wheelmen lobbied for the improvement of roads in the last part of the 19th century, founding and leading the national Good Roads Movement . Their model for political organization, as well as the paved roads for which they argued, facilitated the growth of the automobile. In Europe, the European Cyclists' Federation represents around 70 local, regional and national civil society organisations across more than 40 countries that work to promote cycling as

3080-533: The United States, with an average depth of 1,600 metres (5,200 ft) and a volume of 4.17 trillion cubic metres (147 trillion cubic feet), is one of the world's largest canyons. It was among the 28 finalists of the New 7 Wonders of Nature worldwide poll. (Some referred to it as one of the seven natural wonders of the world .) The largest canyon in Europe is Tara River Canyon . The largest canyon in Africa

3157-627: The United States. Others consider the Kali Gandaki Gorge in midwest Nepal to be the deepest canyon, with a 6,400-metre (21,000 ft) difference between the level of the river and the peaks surrounding it. Vying for the deepest canyon in the Americas is the Cotahuasi Canyon and Colca Canyon , in southern Peru. Both have been measured at over 3,500 metres (11,500 ft) deep. The Grand Canyon of northern Arizona in

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3234-585: The ability to ride well on pavement; mountain bikes , which are designed for more rugged, undulating terrain; and e-bikes , which provide some level of motorized assist for the rider. There are additional variations of bikes and types of biking as well. The price of a new bicycle can range from US$ 50 to more than US$ 20,000 (the highest priced bike in the world is the custom Madone by Damien Hirst , sold at US$ 500,000 ), depending on quality, type and weight (the most exotic road bicycles can weigh as little as 3.2 kg (7 lb) ). However, UCI regulations stipulate

3311-439: The bicycle as a primary form of transport. In Europe, Denmark and the Netherlands have the most bicycles per capita and most often use bicycles for everyday transport. Road bikes tend to have a more upright shape and a shorter wheelbase, which make the bike more mobile but harder to ride slowly. The design, coupled with low or dropped handlebars, requires the rider to bend forward more, making use of stronger muscles (particularly

3388-655: The bicycle include front and rear lights, bells or horns, child carrying seats, cycling computers with GPS, locks, bar tape, fenders (mud-guards), baggage racks, baggage carriers and pannier bags, water bottles and bottle cages. For basic maintenance and repairs cyclists can carry a pump (or a CO 2 cartridge ), a puncture repair kit, a spare inner tube, and tire levers and a set of allen keys . Cycling can be more efficient and comfortable with special shoes , gloves , and shorts . In wet weather, riding can be more tolerable with waterproof clothes, such as cape, jacket, trousers (pants) and overshoes and high-visibility clothing

3465-746: The canyon walls, in a process known as frost wedging. Canyon walls are often formed of resistant sandstones or granite . Sometimes large rivers run through canyons as the result of gradual geological uplift. These are called entrenched rivers , because they are unable to easily alter their course. In the United States, the Colorado River in the Southwest and the Snake River in the Northwest are two examples of tectonic uplift . Canyons often form in areas of limestone rock. As limestone

3542-565: The city's workers. In Bogotá , Colombia the city's largest bakery recently replaced most of its delivery trucks with bicycles. Even the car industry uses bicycles. At the huge Mercedes-Benz factory in Sindelfingen , Germany workers use bicycles, color-coded by department, to move around the factory. Bicycles are used for recreation at all ages. Bicycle touring , also known as cyclotourism, involves touring and exploration or sightseeing by bicycle for leisure. Bicycle tourism has been one of

3619-436: The city. Typically these feature utilitarian city bikes which lock into docking stations, released on payment for set time periods. Costs vary from city to city. In London, initial hire access costs £2 per day. The first 30 minutes of each trip is free, with £2 for each additional 30 minutes until the bicycle is returned. In the Netherlands, many roads have one or two separate cycleways alongside them, or cycle lanes marked on

3696-451: The construction of bike paths , cycle tracks and bike lanes for journeys of all lengths and point to their success in promoting safety and encouraging more people to cycle. Some activists, especially those from the vehicular cycling tradition, view the safety, practicality, and intent of such facilities with suspicion. They favor a more holistic approach based on the 4 'E's : education (of everyone involved), encouragement (to apply

3773-417: The education), enforcement (to protect the rights of others), and engineering (to facilitate travel while respecting every person's equal right to do so). Some groups offer training courses to help cyclists integrate themselves with other traffic. Critical Mass is an event typically held on the last Friday of every month in cities around the world where bicyclists take to the streets en masse . While

3850-498: The existing industries in towns along the river to relocate. The designation was initially opposed by residents fearing government encroachment, due to restrictions in the plan for items such as building paint colors, and was also opposed by conservationists who feared additional development in the region. In 2004, the gorge became the namesake of the Columbia Gorge American Viticultural Area ,

3927-650: The gorge provides the setting for a diverse collection of ecosystems , from the temperate rain forest on the western end—with an average annual precipitation of 75 to 100 inches (1,900 to 2,500 mm)—to the eastern grasslands with average annual precipitation between 10 and 15 inches (250 and 380 mm), to a transitional dry woodland between Hood River and The Dalles . Isolated micro-habitats have allowed for many species of endemic plants and animals to prosper, including at least 13 endemic wildflowers. The gorge transitions between temperate rainforest to dry grasslands in only 80 miles (130 km), hosting

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4004-504: The gorge's major rapids such as Celilo Falls, a major salmon fishing site for local Native Americans until the site's submergence in 1957. In November 1986, Congress made the gorge the second U.S. National Scenic Area and established the Columbia River Gorge Commission as part of an interstate compact . The experimental designation came in lieu of being recognized as a national park , which would require

4081-599: The gorge. A popular recreational destination, the gorge holds federally protected status as the Columbia River Gorge National Scenic Area and is managed by the Columbia River Gorge Commission and the U.S. Forest Service . The Columbia River, Klamath River in northern California , Pit River in northern California, and Fraser River in southern British Columbia are the only four rivers connecting

4158-552: The impact of motorized transport, and by building bike lanes , bike paths and cycle tracks . The provision of cycling infrastructure varies widely between cities and countries, particularly since cycling for transportation almost entirely occurs in public streets. And, the development of computer vision and street view imagery has provided significant potential to assess infrastructure for cyclists. In jurisdictions where motor vehicles were given priority, cycling has tended to decline while in jurisdictions where cycling infrastructure

4235-703: The local environment. Paris–Brest–Paris (PBP), which began in 1891, is the oldest bicycling event still run on a regular basis on the open road, covers over 1,200 km (746 mi) and imposes a 90-hour time limit. Similar if smaller institutions exist in many countries. A study conducted in Taiwan improved the environmental quality for bicyclist tourists which demonstrated greater health benefits in tourists and even in natives. The number of bicyclists in Taiwan increased from 700,000 in 2008 to 5.1 million in 2017. Thus, this resulted in more and safer bicycle routes to be established. When cycling, cyclists take into account

4312-401: The most notable canyons of the world, grouped by region. Venus has many craters and canyons on its surface. The troughs on the planet are part of a system of canyons that is more than 6,400 km long. [REDACTED] Environment portal Biking Cycling , also known as bicycling or biking , is the activity of riding a bicycle or other type of cycle. It encompasses

4389-523: The most popular sports for recreational benefit. A brevet or randonnée is an organized long-distance ride. One popular Dutch pleasure is the enjoyment of relaxed cycling in the countryside of the Netherlands. The land is very flat and full of public bicycle trails and cycle tracks where cyclists are not bothered by cars and other traffic, which makes it ideal for cycling recreation. Many Dutch people subscribe every year to an event called fietsvierdaagse  — four days of organised cycling through

4466-540: The national road test in which children individually complete a circuit on roads near the school while being observed by testers. Cyclists, pedestrians and motorists make different demands on road design which may lead to conflicts. Some jurisdictions give priority to motorized traffic, for example setting up one-way street systems, free-right turns, high capacity roundabouts, and slip roads . Others share priority with cyclists so as to encourage more cycling by applying varying combinations of traffic calming measures to limit

4543-727: The one-day road race, criterium , and time trial to multi-stage events like the Tour de France and its sister events which make up cycling's Grand Tours . Recumbent bicycles were banned from bike races in 1934 after Marcel Berthet set a new hour record in his Velodyne streamliner (49.992 km on 18 November 1933). Track bicycles are used for track cycling in Velodromes , while cyclo-cross races are held on outdoor terrain, including pavement, grass, and mud. Cyclocross races feature human-made features such as small barriers which riders either bunny hop over or dismount and walk over. Time trial races, another form of road racing require

4620-401: The prime minister goes to work by bicycle, when weather permits. This saves the lives of 6,000 citizens per year, prolongs life expectancy by 6 months, saves the country 20 million dollars per year, and prevents 150 grams of CO 2 from being emitted per kilometer of cycling. Utility cycling refers both to cycling as a mode of daily commuting transport as well as the use of a bicycle in

4697-474: The recent years and is performed at places such as Whistler Mountain Bike Park. Slopestyle, a form of downhill, is when riders do tricks such as tailwhips, 360s, backflips and front flips. There are several disciplines of mountain biking besides downhill, including: cross country (often referred to as XC), all mountain, trail, free ride, and newly popular enduro . In 2020, due to COVID-19 , mountain bikes saw

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4774-470: The ride was founded with the idea of drawing attention to how unfriendly the city was to bicyclists, the leaderless structure of Critical Mass makes it impossible to assign it any one specific goal. In fact, the purpose of Critical Mass is not formalized beyond the direct action of meeting at a set location and time and traveling as a group through city streets. There is a long-running cycle helmet debate among activists. The most heated controversy surrounds

4851-470: The rider from shocks of the road and easing steering at low speeds. Utility bicycles tend to be equipped with accessories such as mudguards, pannier racks and lights, which extends their usefulness on a daily basis. Since the bicycle is so effective as a means of transportation, various companies have developed methods of carrying anything from the weekly shop to children on bicycles. Certain countries rely heavily on bicycles and their culture has developed around

4928-426: The rider's strength in relation to the terrain. Many schools and police departments run educational programs to instruct children in bicycle handling skills, especially to introduce them to the rules of the road as they apply to cyclists. In some countries these may be known as bicycle rodeos , or operated as schemes such as Bikeability in the UK. Education for adult cyclists is available from organizations such as

5005-710: The river and over Lolo Pass on the north side of Mount Hood . In 1805, the route was used by the Lewis and Clark Expedition to reach the Pacific. Early European and American settlers subsequently established steamboat lines and railroads through the gorge. Today, the BNSF Railway runs freights along the Washington side of the river, while its rival, the Union Pacific Railroad , runs freights along

5082-476: The river as high up as Crown Point . This quick erosion left many layers of volcanic rock exposed. The Columbia River Gorge is home to a number of plant species that are endemic or found mostly in the gorge and surrounding areas, including Heterotheca villosa , Lomatium columbianum , Lomatium klickitatense , Lomatium suksdorfii , Penstemon barrettiae , and Primula poetica . The gorge has supported human habitation for over 13,000 years. Evidence of

5159-421: The road. On roads where adjacent bike paths or cycle tracks exist, the use of these facilities is compulsory, and cycling on the main carriageway is not permitted. Some 35,000 km of cycle-track has been physically segregated from motor traffic, equal to a quarter of the country's entire 140,000 km road network. A quarter of all trips in the country are made on bicycles, one quarter of them to work. Even

5236-413: The safety on the road, bicycle lanes, smooth roads, diverse scenery, and ride length. Thus, the environment plays a huge role in people's decision factor to use bicycle touring more. This study used many questionnaires and conducted statistical analysis to come up with the conclusion of cyclists' top 5 factors that they consider before making a decision to bike are: safety, lighting facility, design of lanes,

5313-530: The same distance and among people from the same city with the same income level, those with higher education cycle more. As a result, there are various forms of activism focused on diversifying the cycling community. Inspired by the Black Lives Matter movement are organizations such as Street Riders NYC that seek to protest while on bicycles about systemic racism and police brutality. An incidental experience for Street Riders NYC protest participants

5390-408: The same skill level to take advantage of drafting . Most organized rides, for example cyclosportives (or gran fondos), Challenge Rides or reliability trials , and hill climbs include registration requirements and will provide information either through the mail or online concerning start times and other requirements. Rides usually consist of several different routes, sorted by mileage, and with

5467-509: The scene of an incident in Central London more quickly than a motorized ambulance. The use of bicycles by police has been increasing, since they provide greater accessibility to bicycle and pedestrian zones and allow access when roads are congested. In some cases, bicycle officers have been used as a supplement or a replacement for horseback officers. Bicycles enjoy substantial use as general delivery vehicles in many countries. In

5544-457: The surrounding landscape, and how clean the environment is. Thus, after improving these 5 factors, they found much more recreational benefits to bicycle tourism. Many cycling clubs hold organized rides in which bicyclists of all levels participate. The typical organized ride starts with a large group of riders, called the mass, bunch or even peloton . This will thin out over the course of the ride. Many riders choose to ride together in groups of

5621-729: The topic of compulsory helmet use . It is paradoxical that in many developing countries cycling is in decline as bicycles are replaced by motorbikes and cars, while in many developed countries cycling is on the rise. Within western societies the demographic of those who cycle is often not representative of broader society. Research by TfL in London, UK, suggests that cyclists in London are typically 'white, under 40, male, with medium to high household income.' Studies from large-scale representative data from Germany show that people with higher levels of education cycle substantially more often than those with lower levels of education. Even for trips of

5698-425: The use of human-powered vehicles such as balance bikes , unicycles , tricycles , and quadricycles . Cycling is practised around the world for purposes including transport , recreation , exercise , and competitive sport . Cycling became popularized in Europe and North America in the latter part and especially the last decade of the 19th century. Today, over 50 percent of the human population knows how to ride

5775-456: The valley walls. Canyons are much more common in arid areas than in wet areas because physical weathering has a more localized effect in arid zones. The wind and water from the river combine to erode and cut away less resistant materials such as shales . The freezing and expansion of water also serves to help form canyons. Water seeps into cracks between the rocks and freezes, pushing the rocks apart and eventually causing large chunks to break off

5852-490: The watersheds on the east side of the Cascade Range to the Pacific Ocean . Each river has carved out a gorge through the Cascades. The Columbia River Gorge marks the state line between Oregon and Washington, and its wide range of elevation and precipitation makes it an extremely diverse and dynamic place. Ranging from 4,000 feet (1,200 m) to sea level, and transitioning from 100 inches (2,500 mm) of precipitation to only 10 inches (250 mm) in 80 miles (130 km),

5929-716: Was built, cycling rates have remained steady or increased. Occasionally, extreme measures against cycling may occur. In Shanghai, where bicycles were once the dominant mode of transport , bicycle travel on a few city roads was banned temporarily in December 2003. In areas in which cycling is popular and encouraged, cycle-parking facilities using bicycle stands , lockable mini-garages, and patrolled cycle parks are used to reduce theft. Local governments promote cycling by permitting bicycles to be carried on public transport or by providing external attachment devices on public transport vehicles. Conversely, an absence of secure cycle-parking

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