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75-544: Grand Portage National Monument is a United States National Monument located on the north shore of Lake Superior in northeastern Minnesota that preserves a vital center of fur trade activity and Anishinaabeg Ojibwe heritage. The area became one of the British Empire 's four main fur trading centers in North America, along with Fort Niagara , Fort Detroit , and Michilimackinac . The Grand Portage

150-521: A pow wow , which attracts many Native American visitors. The Rendezvous and Pow Wow coincide with the Perseid meteor shower. The four corner rooms off of the Great Hall are each decorated to represent a different aspect of the fur trade, including a shareholder's bedroom, a trading post with examples of furs and goods that would have been exchanged, a London streetscape with finished goods made from

225-401: A sloop rig is simpler and cheaper, the schooner rig may be chosen on a larger boat so as to reduce the overall mast height and to keep each sail to a more manageable size, giving a mainsail that is easier to handle and to reef. An issue when planning a two-masted schooner's rig is how best to fill the space between the masts: for instance, one may adopt (i) a gaff sail on the foremast (even with

300-432: A Bermuda mainsail), or (ii) a main staysail, often with a fisherman topsail to fill the gap at the top in light airs. Various types of schooners are defined by their rig configuration. Most have a bowsprit although some were built without one for crew safety, such as Adventure . The following varieties were built: Schooners were built primarily for cargo, passengers, and fishing. The Norwegian polar schooner Fram

375-415: A common rig, especially in the 19th century. Some schooners worked on deep sea routes. In British home waters, schooners usually had cargo-carrying hulls that were designed to take the ground in drying harbours (or, even, to unload dried out on an open beach). The last of these once-common craft had ceased trading by the middle of the 20th century. Some very large schooners with five or more masts were built in

450-437: A map for Pierre Gaultier de Varennes, sieur de La Vérendrye , one of the early French fur traders , showing how to reach the "western sea" of Lake Winnipeg . In time, Grand Portage became the gateway into rich northern fur-bearing country, where it connected remote interior outposts to lucrative international markets. The Grand Portage trail is an 8.5-mile (13.7 km) trail connecting Grand Portage with Fort Charlotte on

525-705: A new route that ran west over the Petit Neuf or Watape Portage to Watape Lake which is in the Arrow River drainage. Then through the Petit Detroit to Rove Lake and the Grand Neuf or Long Portage to Rose Lake at the west end of Arrow Lake. From Rose Lake up the Arrow to South Lake. From South Lake north over the 700-yard Height of Land Portage to North Lake whose waters flow west to Lake Winnipeg. From here

600-523: A post office was created in 1856. In 1887 the government chose to abolish the reservation, opening it to general settlement. In 1951 the property was designated as the Grand Portage National Historic Site and opened for visitors. In 1958, it was designated a National Monument . The portage trail has also been separately designated a Minnesota State Historic Site. The monument's 710 acres (2.9 km) lie entirely within

675-517: A smaller crew for their size compared to then traditional ocean crossing square rig ships, and being fast and versatile. Three-masted schooners were introduced around 1800. Schooners were popular on both sides of the Atlantic in the late 1800s and early 1900s. By 1910, 45 five-masted and 10 six-masted schooners had been built in Bath, Maine and in towns on Penobscot Bay , including Wyoming which

750-467: A sunken body will bloat it with gas, causing it to float to the surface after a few days. But Lake Superior's water is cold enough year-round to inhibit bacterial growth , and bodies tend to sink and never resurface. Joe MacInnis reported that in July 1994, explorer Frederick Shannon's Expedition 94 to the wreck of Edmund Fitzgerald discovered a man's body near the port side of her pilothouse, not far from

825-482: A very small ratio (1.55) of catchment area to surface area, which indicates minimal terrestrial influence. American limnologist J. Val Klump was the first person to reach the lowest depth of Lake Superior on July 30, 1985, as part of a scientific expedition, which at 122 fathoms 1 foot (733 ft or 223 m) below sea level is the second-lowest spot in the continental interior of the United States and

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900-716: Is Isle Royale in Michigan. Isle Royale contains several lakes, some of which also contain islands. Other well-known islands include Madeline Island in Wisconsin, Michipicoten Island in Ontario, and Grand Island (the location of the Grand Island National Recreation Area ) in Michigan. The larger cities on Lake Superior include the twin ports of Duluth, Minnesota , and Superior, Wisconsin ; Thunder Bay , Ontario; Marquette, Michigan ; and

975-408: Is 0.33 feet (0.10 m) below the datum. In the winter of 1926 Lake Superior reached its lowest recorded level at 1.58 feet (0.48 m) below the datum. Additionally, the entire first half of the year (January to June) included record low months. The low water was a continuation of the dropping lake levels from the previous year, 1925, which set low-water records for October through December. During

1050-423: Is 4,229 feet (1,289 m) above sea level.) While the temperature of the surface of Lake Superior varies seasonally, the temperature below 110 fathoms (660 ft; 200 m) is an almost constant 39 °F (4 °C). This variation in temperature makes the lake seasonally stratified . Twice per year, however, the water column reaches a uniform temperature of 39 °F (4 °C) from top to bottom, and

1125-500: Is 80.5 fathoms (483 ft; 147 m) with a maximum depth of 222.17 fathoms (1,333 ft; 406 m). Lake Superior contains 2,900 cubic miles (12,100 km ) of water. There is enough water in Lake Superior to cover the entire land mass of North and South America to a depth of 30 centimetres (12 in). The shoreline of the lake stretches 2,726 miles (4,387 km) (including islands). The lake boasts

1200-537: Is a designated scenic road system connecting all of the Great Lakes and the St. Lawrence River. Lake Superior's size reduces the severity of the seasons of its humid continental climate (more typically seen in locations like Nova Scotia ). The water surface's slow reaction to temperature changes, seasonally ranging between 32 and 55 °F (0–13 °C) around 1970, helps to moderate surrounding air temperatures in

1275-648: Is an 8.5-mile (13.7 km) (2720 rod ) footpath which bypasses a set of waterfalls and rapids on the last 20 miles (32 km) of the Pigeon River before it flows into Lake Superior . This path is part of the historic trade route of the French-Canadian voyageurs and coureur des bois between their wintering grounds and their depots to the east. Composed of the Pigeon River and other strategic interior streams, lakes, and portages, this route

1350-449: Is an unusual record of environmental nitrogen buildup. It may relate to anthropogenic alternations to the regional nitrogen cycle , but researchers are still unsure of the causes of this change to the lake's ecology. As for other Great Lakes fish, populations have also been affected by the accidental or intentional introduction of foreign species such as the sea lamprey and Eurasian ruffe . Accidental introductions have occurred in part by

1425-714: Is considered the largest wooden ship ever built. The Thomas W. Lawson was the only seven-masted schooner built. The rig is rarely found on a hull of less than 50 feet LOA , and small schooners are generally two-masted. In the two decades around 1900, larger multi-masted schooners were built in New England and on the Great Lakes with four, five, six, or even, seven masts. Schooners were traditionally gaff-rigged, and some schooners sailing today are reproductions of famous schooners of old, but modern vessels tend to be Bermuda rigged (or occasionally junk-rigged) . While

1500-486: Is the head of a drainage flowing to the Pigeon River at Fort Charlotte. The headwaters has become a large beaver pond. The dam is located along the trail route and has a boardwalk atop it, added for modern visitors. Almost all the information known about the physical layout of Grand Portage National Monument comes from archeological studies. John McDonell, a clerk for the North West Company , identified

1575-525: The Grand Portage Band of Lake Superior Chippewa. It overlooks the reconstructed fur trading post. This section covers the voyageur route from Grand Portage westward to the juncture of the route from Fort William at Lac La Croix. The Pigeon River is about 3 miles (5 km) directly north of the reconstructed fort. The Pigeon flows basically east and enters Lake Superior at a bay about 5 miles (8 km) east northeast. The portage trail meets

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1650-637: The Great Lakes of North America , straddling the Canada–United States border with the Canadian province of Ontario to the north and east and the U.S. states of Minnesota to the west and Michigan and Wisconsin to the south. It drains into Lake Huron via St. Marys River , then through the lower Great Lakes to the St. Lawrence River and ultimately the Atlantic Ocean. The Ojibwe name for

1725-707: The Hudson Bay watershed, are regulated by the International Lake Superior Board of Control , which was established in 1914 by the International Joint Commission . Lake Superior's water level was at a new record low in September 2007, slightly less than the previous record low in 1926. Water levels recovered within a few days. Historic high water The lake's water level fluctuates from month to month, with

1800-768: The Pic River , the White River , the Michipicoten River , the Bois Brule River and the Kaministiquia River . The lake's outlet at St. Marys River has a relatively steep gradient with rapids. The Soo Locks enable ships to bypass the rapids and to overcome the 25-foot (8 m) height difference between Lakes Superior and Huron. The lake's average surface elevation is 600 feet (183 m) above sea level . Until approximately 1887,

1875-738: The Rainy River watershed. Grand Portage therefore was an essential link between the drainage basin of the Nelson River to Hudson Bay and that of the Saint Lawrence River to the Atlantic Ocean. As early as 2,000 years ago, Native American Nations probably used Gichi-onigaming , or "the Great Carrying Place", to travel from summer homes on Lake Superior to winter hunting grounds in the interior of Minnesota and Ontario . In 1729 Cree guide Auchagah drew

1950-468: The Sawtooth Mountain range. It briefly levels off around 1,000 feet (300 m) after 2.6 miles (4.2 km). Another 1.5 miles (2.4 km) you reach the inland county highway. From here, the trail is more level, rising to 1,300 feet (400 m), the highest location on the trail, before dropping back to 1,260 feet (380 m) at Fort Charlotte on the Pigeon River. The trail's high point

2025-781: The Whitefish Point Underwater Preserve . Storms that claimed multiple ships include the Mataafa Storm in November 1905 and the Great Lakes Storm of 1913 . Wreckage of SS  Cyprus —a 420-foot (130 m) ore carrier that sank on October 11, 1907, during a Lake Superior storm in 77 fathoms (460 ft or 140 m) of water—was located in August 2007. Built in Lorain, Ohio , Cyprus

2100-502: The lake effect snow belts along the shores of the lake, especially in the Upper Peninsula of Michigan . Two recent consecutive winters (2013–2014 and 2014–2015) brought high ice coverage to the Great Lakes, and on March 6, 2014, overall ice coverage peaked at 92.5%, the second-highest in recorded history. Lake Superior's ice coverage further beat 2014's record in 2019, reaching 95% coverage. The largest island in Lake Superior

2175-672: The 8.5-mile (13.7 km) trail leads westward into the wilderness to a mid-point on the Pigeon River , bypassing numerous rapids and a variety of waterfalls. (The most notable are Middle Falls and Pigeon Falls . Both are part of the Grand Portage State Park and are within the Rove Formation . Middle Falls is most easily seen from Pigeon River Provincial Park on the Canadian side of the border.) The portage begins on Lake Superior, elevation 600 feet (180 m), rising as it moves westward through two notches in

2250-788: The French colonial style, which housed their meetings, a general store, and other facilities. British operations in Grand Portage came under pressure after the signing of the Jay Treaty in 1795, the finalization of western portion of the U.S./Canada border in 1818, and gradual settlement of the Minnesota Territory by U.S. settlers. In mid-July 1802, partners of the North West Company , the most successful fur trade company in North America, met in their Grand Hall at Grand Portage. They voted to move their summer headquarters from

2325-526: The Hudson's Bay Company name. Many towns around the lake are current or former mining areas, or engaged in processing or shipping. Today, tourism is another significant industry: the sparsely populated Lake Superior country, with its rugged shorelines and wilderness, attracts vacationers and adventurers. Lake Superior has been an important link in the Great Lakes Waterway , providing a route for

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2400-612: The Midcontinent Rift, and there are several amethyst mines in the Thunder Bay area. Lava erupted from the rift and formed the black basalt rock of Michipicoten Island, Black Bay Peninsula, and St. Ignace Island . In the most recent geological history, during the Wisconsin glaciation 10,000 years ago, ice covered the region at a thickness of 1.25 miles (2 km). The land contours familiar today were carved by

2475-527: The Pigeon River. Voyageurs from the Rupert's Land would carry their furs by canoe to Fort Charlotte, and portage the bundles of fur to Grand Portage. There they met traders from Montreal, and exchanged the furs for trade goods and supplies. Each canoe "brigade" then returned to its starting place. The fur traders built Fort Charlotte as a trading fort at Grand Portage. There they built the Grand Hall in

2550-536: The Pigeon about 9 miles (14 km) northwest at the former Fort Charlotte. The portage existed to bypass the river east of Fort Charlotte. From Fort Charlotte the canoe route then went west up the Pigeon past the mouth of the Arrow River to the east-west Mountain Lake. The old Native American route went north, with a drop of 125 feet (38 m), to the east-west Arrow Lake. The voyageurs, with their heavy freight canoes, cut

2625-647: The United States from circa 1880–1920. They mostly carried bulk cargoes such as coal and timber. In yachting, schooners predominated in the early years of the America's Cup . In more recent times, schooners have been used as sail training ships. The type was further developed in British North America starting around 1713. In the 1700s and 1800s in what is now New England and Atlantic Canada schooners became popular for coastal trade, requiring

2700-483: The advance and retreat of the ice sheet . The retreat left gravel, sand, clay and boulder deposits. Glacial meltwaters gathered in the Superior basin creating Lake Minong , a precursor to Lake Superior. Without the immense weight of the ice, the land rebounded , and a drainage outlet formed at Sault Ste. Marie, becoming today's St. Mary's River. The first people came to the Lake Superior region 10,000 years ago after

2775-628: The arrival of Europeans, the Anishinaabe made themselves middle-men between the French fur traders and other Native peoples. They soon became the dominant Native American nation in the region: they forced out the Sioux and Fox and won a victory against the Iroquois west of Sault Ste. Marie in 1662. By the mid-18th century, the Ojibwe occupied all of Lake Superior's shores. In the 18th century, as

2850-603: The booming fur trade supplied Europe with beaver hats , the Hudson's Bay Company had a virtual monopoly in the region until 1783, when the rival North West Company was formed. The North West Company built forts on Lake Superior at Grand Portage , Fort William , Nipigon, the Pic River, the Michipicoten River, and Sault Ste. Marie. But by 1821, with competition harming the profits of both, the companies merged under

2925-576: The boundaries of the Grand Portage Indian Reservation . The depot was reconstructed to allow celebration of the fur trade and Ojibwe lifeways. It was added to the National Register of Historic Places in 1966. The portage trail exists in much the same location and condition as in historic times. Visitors can hike 8.5 miles (13.7 km) from Lake Superior to the Pigeon River . Volunteers and park staff at

3000-623: The direct ancestors of the Ojibwe and Cree . The people of the Laurel complex (c. 500 BC to AD 500) developed seine net fishing, evidence being found at rivers around Superior such as the Pic and Michipicoten. The people of the Terminal Woodland period were evident in the area from AD 900 to 1650. They were Algonquian peoples who hunted, fished and gathered berries. They used snowshoes , birch bark canoes and conical or domed lodges. At

3075-621: The early 17th century in paintings by Dutch marine artists. The earliest known illustration of a schooner depicts a yacht owned by the mayors (Dutch: burgemeesters) of Amsterdam, drawn by the Dutch artist Rool and dated 1600. Later examples show schooners (Dutch: schoeners) in Amsterdam in 1638 and New Amsterdam in 1627. Paintings by Van de Velde (1633–1707) and an engraving by Jan Kip of the Thames at Lambeth, dated 1697, suggest that schooner rig

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3150-592: The fast conveyance of passengers and goods) were often schooners. Fruit schooners were noted for their quick passages, taking their perishable cargoes on routes such as the Azores to Britain. Some pilot boats adopted the rig. The fishing vessels that worked the Grand Banks of Newfoundland were schooners, and held in high regard as an outstanding development of the type. In merchant use, the ease of handling in confined waters and smaller crew requirements made schooners

3225-614: The first one written for the Ojibway language, gives the Ojibwe name as Otchipwe-kitchi-gami (a transliteration of Ojibwe Gichigami ). In the 17th century, the first French explorers approached the great inland sea by way of the Ottawa River and Lake Huron; they referred to their discovery as le lac supérieur (the upper lake, i.e., above Lake Huron). Some 17th-century Jesuit missionaries referred to it as Lac Tracy (for Alexandre de Prouville de Tracy ). After taking control of

3300-588: The furs that came through Grand Portage, and a hatter's shop showing the steps of turning beaver pelts into fine felt hats. Opened in 2007, the Grand Portage National Monument Heritage Center features exhibit galleries about Ojibwe culture and the fur trade, a bookstore, multi-media programs, park offices, archives and a classroom. The center is a collaboration between the National Park Service and

3375-535: The highest lake levels in October and November. The normal high-water mark is 1.17 feet (0.36 m) above the datum (601.1 ft or 183.2 m). In the summer of 1985, Lake Superior reached its highest recorded level at 2.33 feet (0.71 m) above the datum. 2019 and 2020 set new high-water records in nearly every month. Historic low water The lake's lowest levels occur in March and April. The normal low-water mark

3450-621: The lake appeared to have increased by about 4.5 °F (2.5 °C) between 1979 and 2007, compared with an approximately 2.7 °F (1.5 °C) increase in the surrounding average air temperature. The increase in the lake's surface temperature may be related to the decreasing ice cover. Less winter ice cover allows more solar radiation to penetrate and warm the water. If trends continue, Lake Superior, which freezes over completely once every 20 years, could routinely be ice-free by 2040 although more current data through 2021 does not support this trend. Warmer temperatures could lead to more snow in

3525-621: The lake is gichi-gami (in syllabics : ᑭᒋᑲᒥ , pronounced gitchi-gami or kitchi-gami in different dialects), meaning "great sea". Henry Wadsworth Longfellow wrote this name as " Gitche Gumee " in the poem The Song of Hiawatha , as did Gordon Lightfoot in his song " The Wreck of the Edmund Fitzgerald ". According to other sources, the full Ojibwe name is ᐅᒋᑉᐧᐁ ᑭᒋᑲᒥ Ojibwe Gichigami ("Ojibwe's Great Sea") or ᐊᓂᐦᔑᓈᐯ ᑭᒋᑲᒥ Anishinaabe Gichigami (" Anishinaabe 's Great Sea"). The 1878 dictionary by Father Frederic Baraga ,

3600-480: The lake waters thoroughly mix. This feature makes the lake dimictic . Because of its volume, Lake Superior has a retention time of 191 years. Annual storms on Lake Superior regularly feature wave heights of over 20 feet (6 m). Waves well over 30 feet (9 m) have been recorded. Lake Superior is fed by more than 200 rivers, including the Nipigon River , the St. Louis River , the Pigeon River ,

3675-463: The lake. With 78 crewmembers dead, their sinking marked the largest loss of life on Lake Superior to date. SS  Edmund Fitzgerald is the last ship that sank in Lake Superior, 15 nautical miles (28 km; 17 mi) from Whitefish Point in a storm on November 10, 1975. The wreck was immortalized by Gordon Lightfoot in his ballad "The Wreck of the Edmund Fitzgerald " . All 29 crew members died, and no bodies were recovered. Edmund Fitzgerald

3750-420: The materials north in company schooners for use in constructing the planned new Fort William , far from U.S. soil. The buildings were constructed from native squared spruce , pine and birch and were surrounded by more than 2,000 cedar pickets. In 1854 the Ojibwe signed a treaty with the U.S. establishing Grand Portage as part of their reservation. A school was established to educate the tribe members and

3825-628: The monument dress in period attire. They staff the Kitchen, Great Hall, Canoe Warehouse, Ojibwe Village and Voyageur Encampment in and around the Stockade, and explain and interpret what life was like at the trading post at the turn of the 18th century. During the second weekend of August, the Grand Portage National Monument hosts a rendezvous re-enactment. At the same time, the Grand Portage Indian Reservation holds

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3900-446: The most frequently mined. Notable production includes gold from the Hemlo mine near Marathon , copper from the Keweenaw Peninsula and the Mamainse Point Formation , iron from the Gogebic Range , silver at Silver Islet , and uranium at Theano Point. The mountains steadily eroded, depositing layers of sediments that compacted and became limestone , dolomite , taconite and the shale at Kakabeka Falls . The continental crust

3975-407: The mouth of the Michipicoten River, nine layers of encampments have been discovered. Most of the Pukaskwa Pits were likely made during this time. The Anishinaabe people (an ethnic grouping including the Ojibwe/Chippewa ) have inhabited the Lake Superior region for over five hundred years and were preceded by the Dakota , Meskwaki (Fox) , Menominee , Nipigon, Noquet and Gros Ventres . After

4050-468: The natural hydraulic conveyance through the St. Marys River rapids determined the outflow from Lake Superior. By 1921, development in support of transportation and hydroelectric power resulted in gates, locks, power canals and other control structures completely spanning St. Marys rapids. The regulating structure is known as the Compensating Works and is operated according to a regulation plan known as Plan 1977-A. Water levels, including diversions of water from

4125-453: The nine-month period of October 1925 to June 1926, water levels ranged from 1.58 feet (0.48 m) to 0.33 feet (0.10 m) below Chart Datum. In the summer of 2007 monthly historic lows were set; August at 0.66 feet (0.20 m), and September at 0.58 feet (0.18 m). According to a study by professors at the University of Minnesota Duluth , Lake Superior may have warmed faster than its surrounding area. Summer surface temperatures in

4200-976: The open door, "fully clothed, wearing an orange life jacket, and lying face down in the sediment". In February 2024 it was announced that wreckage from the Arlington was discovered from a sinking in 1940. More than 80 species of fish have been found in Lake Superior. Species native to the lake include banded killifish , bloater , brook trout , burbot , cisco , lake sturgeon , lake trout , lake whitefish , longnose sucker , muskellunge , northern pike , pumpkinseed , rock bass , round whitefish , smallmouth bass , walleye , white sucker and yellow perch . In addition, many fish species have been either intentionally or accidentally introduced to Lake Superior: Atlantic salmon , brown trout , carp , chinook salmon , coho salmon , freshwater drum , pink salmon , rainbow smelt , rainbow trout , round goby , ruffe , sea lamprey and white perch . Lake Superior has fewer dissolved nutrients relative to its water volume than

4275-514: The other Great Lakes and so is less productive in terms of fish populations and is an oligotrophic lake . This is a result of the underdeveloped soils found in its relatively small watershed. It is also a reflection of relatively small human population and small amount of agriculture in its watershed. However, nitrate concentrations in the lake have been continuously rising for more than a century. They are still much lower than levels considered dangerous to human health; but this steady, long-term rise

4350-500: The other Great Lakes began sailing in 1816. Ice closes the lake shipping from mid-January to late March. Exact dates for the shipping season vary each year, depending on weather conditions that form and break the ice. The southern shore of Lake Superior between Grand Marais, Michigan , and Whitefish Point is known as the " Graveyard of the Great Lakes "; more ships have been lost around the Whitefish Point area than any other part of Lake Superior. These shipwrecks are now protected by

4425-413: The protected shores of Lake Superior's Grand Portage Bay 50 miles (80 km) north to the mouth of the Kaministiquia River . Almost from the time the British Nor'Westers had organized at Grand Portage in the mid-1780s, an emerging United States wanted them to stop competing with Americans in this territory. The July vote meant that the North West Company would tear down its 18 buildings and transport

4500-401: The region from the French in the 1760s following their defeat in the French and Indian War , the British anglicized the lake's name to Superior , "on account of its being superior in magnitude to any of the lakes on that vast continent". Lake Superior empties into Lake Huron via the St. Marys River and the Soo Locks (Sault Ste. Marie locks). Lake Superior is the largest freshwater lake in

4575-428: The removal of natural barriers to navigation between the Great Lakes. Overfishing has also been a factor in the decline of fish populations. Schooners The name "schooner" first appeared in eastern North America in the early 1700s. The name may be related to a Scots word meaning to skip over water, or to skip stones. The origins of schooner rigged vessels is obscure, but there is good evidence of them from

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4650-489: The retreat of the glaciers in the Last Glacial Period . They are known as the Plano , and they used stone-tipped spears to hunt caribou on the northwestern side of Lake Minong. The Shield Archaic peoples arrived around 5000 BC; evidence of this culture can be found at the eastern and western ends of the Canadian shore. They used bows and arrows, paddled dugout canoes, fished, hunted, mined copper for tools and weapons, and established trading networks. They are believed to be

4725-407: The route went west down through several rivers and numerous lakes to Lac La Croix where the route from Fort William came in. Lac La Croix is about 100 miles (160 km) west of Grand Portage and about 66 miles (106 km) west of Height of Land Portage. The Grand Portage was developed in order to avoid numerous short portages. Beginning at the stockade on Grand Portage Bay of Lake Superior ,

4800-432: The routes between Grand Portage and Rainy Lake in the 1790s. Henry Hind in 1860 traced the route and provided more details than provided by McDonell. Lake Superior Lake Superior is the largest freshwater lake in the world by surface area and the third-largest freshwater lake by volume , holding 10% of the world's surface fresh water. Located in central North America, it is the northernmost and westernmost of

4875-413: The summer (cooler with frequent sea breeze formations) and winter, and creates lake-effect snow in colder months. The hills and mountains that border the lake hold moisture and fog, particularly in the fall. The rocks of Lake Superior's northern shore date back to the early history of the earth. During the Precambrian (between 4.5 billion and 540 million years ago) magma forcing its way to

4950-399: The surface created the intrusive granites of the Canadian Shield . These ancient granites can be seen on the North Shore today. It was during the Penokean orogeny , part of the process that created the Great Lakes tectonic zone , that many valuable metals were deposited. The region surrounding the lake has proved to be rich in minerals, with copper , iron , silver , gold and nickel

5025-402: The third-lowest spot in the interior of the North American continent after Great Slave Lake in the Northwest Territories of Canada (1,503 ft or 458 m below sea level) and Iliamna Lake in Alaska 942 ft or 287 m. (Though Crater Lake is the deepest lake in the United States and deeper than Lake Superior, Crater Lake's elevation is higher and consequently its deepest point

5100-403: The transportation of iron ore as well as grain and other mined and manufactured materials. Large cargo vessels called lake freighters , as well as smaller ocean-going freighters , transport these commodities across Lake Superior. Shipping was slow to arrive at Lake Superior in the 19th century. The first steamboat to run on the lake was the Independence in 1847, whereas the first steamers on

5175-636: The twin cities of Sault Ste. Marie, Michigan , and Sault Ste. Marie, Ontario . Duluth-Superior , at the western end of Lake Superior, is the most inland point on the Saint Lawrence Seaway and the most inland port in the world. Among the scenic places on the lake are Apostle Islands National Lakeshore , Brockway Mountain Drive on the Keweenaw Peninsula , Isle Royale National Park , Porcupine Mountains Wilderness State Park , Pukaskwa National Park , Lake Superior Provincial Park , Grand Island National Recreation Area, Sleeping Giant (Ontario) and Pictured Rocks National Lakeshore . The Great Lakes Circle Tour

5250-535: The world by area and the third largest in volume, behind Lake Baikal in Siberia and Lake Tanganyika in East Africa . The Caspian Sea , while larger than Lake Superior in both surface area and volume, is brackish . Lake Superior has a surface area of 31,700 square miles (82,103 km ), which is approximately the size of South Carolina or Austria . It has a maximum length of 350 statute miles (560  km ; 300  nmi ) and maximum breadth of 160 statute miles (257 km; 139 nmi). Its average depth

5325-406: Was battered so intensely by Lake Superior that the 729-foot (222 m) ship split in half; her two pieces lie approximately 170 feet (52 m) apart at a depth of 88 fathoms (530 ft or 160 m). Lightfoot sings that "Superior, they said, never gives up her dead". This is because of the unusually cold water, under 36 °F (2 °C) on average around 1970. Normally, bacteria decaying

5400-461: Was common in England and Holland by the end of the 17th century. The Royal Transport was an example of a large British-built schooner, launched in 1695 at Chatham. The schooner rig was used in vessels with a wide range of purposes. On a fast hull, good ability to windward was useful for privateers, blockade runners, slave ships, smaller naval craft and opium clippers. Packet boats (built for

5475-545: Was later riven , creating one of the deepest rifts in the world. The lake lies in this long-extinct Mesoproterozoic rift valley , the Midcontinent Rift . Magma was injected between layers of sedimentary rock , forming diabase sills . This hard diabase protects the layers of sedimentary rock below, forming the flat-topped mesas in the Thunder Bay area. Amethyst formed in some of the cavities created by

5550-493: Was launched August 17, 1907, and was lost on her second voyage hauling iron ore from Superior, Wisconsin, to Buffalo, New York , with the sole survivor among her 23 crew being Charles G. Pitz. In 1918 the last warships to sink in the Great Lakes, French minesweepers Inkerman and Cerisoles , vanished in a Lake Superior storm, perhaps upon striking the uncharted danger of the Superior Shoal in an otherwise deep part of

5625-691: Was of enormous importance in pre-industrial times. It provided quick water access from Canada's settled areas and Atlantic ports to the fur-rich Rupert's Land and the North-Western Territory . Some 50 miles (80 km) upstream from Lake Superior, this trade route crosses the Height of Land Portage , on the Northern continental divide , and connects South Lake in the Pigeon River/Great Lakes watershed with North Lake of

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