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Bighorn, river, United States

(Encyclopedia)Bighorn, river, 461 mi (741 km) long, formed in W central Wyo. by the confluence of the Wind and Pop Agie rivers and flowing north to join the Yellowstone River in S Mont. The Bighorn basin, part of t...

Bitterroot, river, United States

(Encyclopedia)Bitterroot, river, c.120 mi (190 km) long, rising in SW Mont. and flowing north to join the Clark Fork River near Missoula. A Roman Catholic mission was established on the river in 1841, and missionar...

Weber, river, United States

(Encyclopedia)Weber wēˈbər [key], river, c.125 mi (200 km) long, rising in the Uinta Mts., N central Utah, and flowing north and northwest to join the Ogden River at Ogden. The combined stream flows to the Great...

Grand River, river, Canada

(Encyclopedia)Grand River, c.165 mi (270 km) long, rising in the highlands of the Ontario Peninsula, S Ont., Canada, and flowing S past Kitchener and Brantford, then SE to Lake Erie at Port Maitland. It is navigabl...

Rio Grande, river, United States and Mexico

(Encyclopedia)Rio Grande rēˈō grănd, rēˈō gränˈdē [key], river, c.1,885 mi (3,000 km) long, rising in SW Colo. in the San Juan Mts. and flowing south through the middle of N.Mex., past Albuquerque, then c...

Lewis, rivers, United States and Canada

(Encyclopedia)Lewis. 1 Early name of the Snake River. 2 River, c.95 mi (155 km) long, rising in the Cascade Range, SW Wash., and flowing SW to the Columbia River NW of Vancouver. Three privately owned dams furnish ...

Moose, river, Canada

(Encyclopedia)Moose, river, c.50 mi (80 km) long, formed in central Ont., Canada, by the Mattagami and Missinaibi rivers. It flows NE to its confluence with the Abitibi River and into SW James Bay near Moosonee. ...

Montmorency, river, Canada

(Encyclopedia)Montmorency, river, c.60 mi (100 km) long, rising in the Laurentian Mts., S Que., Canada, and flowing generally S to the St. Lawrence River. Near its mouth are Montmorency Falls (275 ft/84 m high), pr...

Mississippi, river, Canada

(Encyclopedia)Mississippi, river, c.100 mi (160 km) long, rising E of the Kawartha Lakes, S Ont., Canada, and flowing NE through Mississippi Lake, then N to the Ottawa River near Arnprior. It is navigable for small...

Hay, river, Canada

(Encyclopedia)Hay, river, c.530 mi (850 km) long, rising in several headstreams in NE British Columbia and NW Alta., Canada, and flowing generally NE through NW Alta., over Alexander Falls, and into Great Slave Lak...