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Missouri, river, United States

(Encyclopedia)Missouri, river, c.2,565 mi (4,130 km) long (including its Jefferson-Beaverhead-Red Rock headstream), the longest river of the United States and the principal tributary of the Mississippi River. The l...

Great Bear Lake

(Encyclopedia)Great Bear Lake, largest lake of Canada and fourth largest of North America, c.12,275 sq mi (31,800 sq km), c.190 mi (310 km) long and from 25 to 110 mi (40–177 km) wide, Northwest Territories, on t...

Orange River

(Encyclopedia)Orange River, chief river of S Africa, c.1,300 mi (2,090 km) long, rising in the Maluti Mts., N Lesotho. It flows SW through Lesotho, then meanders northwest and west through central South Africa, for...

Parsnip, river, Canada

(Encyclopedia)Parsnip, river, c.150 mi (240 km) long, rising in central British Columbia, Canada, and flowing northwest to join the Finlay River at Williston Lake and form the Peace River. Explored by Sir Alexander...

Ottawa, river, Canada

(Encyclopedia)Ottawa, river, c.700 mi (1,130 km) long, largest tributary of the St. Lawrence River, Canada. It rises in the Laurentian Highlands, SW Que., and flows generally W through La Vérendrye Provincial Park...

Senegal, river, Africa

(Encyclopedia)Senegal sĕnĭgôlˈ, sĕnˈĭgôl [key], river, c.1,000 mi (1,610 km) long, formed in SW Mali, W Africa, by the confluence of the Bafing and Bakoy rivers, both of which rise in the Fouta Djallon, N G...

Great Slave Lake

(Encyclopedia)Great Slave Lake, second largest lake of Canada, c.10,980 sq mi (28,400 sq km), Northwest Territories, named for the Slave (Dogrib), a tribe of Native Americans. It is c.300 mi (480 km) long and from ...

Trent , river, England

(Encyclopedia)Trent, river, c.170 mi (270 km) long, rising on Biddulph Moor, Staffordshire, W England. It flows generally NE through central England before joining with the Ouse River to form the Humber estuary. Th...

Pará, river, Brazil

(Encyclopedia)Pará, river, c.200 mi (320 km) long, N Brazil. It is actually the southeastern arm or estuary of the Amazon, divided from the rest of the river by Marajó island. It receives the waters of the Tocant...

Gambia, river, Africa

(Encyclopedia)Gambia, river, c.700 mi (1,130 km) long, rising on the Fouta Djallon, N Guinea, W Africa, and flowing generally northwest through SE Senegal then west, bisecting The Gambia, to the Atlantic Ocean at B...