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Clearwater, river, United States

(Encyclopedia)Clearwater, river, c.190 mi (305 km) long, rising in several branches in the Bitterroot Range, N Idaho, and flowing west to join the Snake River at Lewiston, Idaho. The gold-mining era in Idaho began ...

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...

Penobscot, river, United States

(Encyclopedia)Penobscot pənŏbˈskŏt [key], river, 350 mi (563 km) long, rising in numerous lakes in central Maine and flowing generally east in four branches, uniting, then flowing S into Penobscot Bay; longest ...

Merrimack, river, United States

(Encyclopedia)Merrimack, river, c.110 mi (180 km) long, formed at Franklin, S central N.H., by the junction of the Pemigewasset (rising in the White Mts.) and Winnipesaukee rivers. It flows S past Concord and Manch...

Snake, river, United States

(Encyclopedia)Snake, river, 1,038 mi (1,670 km) long, NW United States, the chief tributary of the Columbia; once called the Lewis River. The Snake rises in NW Wyoming, in Yellowstone National Park, flows through J...

Sun, river, United States

(Encyclopedia)Sun, river, c.130 mi (210 km) long, rising in the Rocky Mts., NW Mont., and flowing generally E to the Missouri River at Great Falls. The Sun River project of the U.S. Bureau of Reclamation utilizes t...

Mississippi, river, United States

(Encyclopedia)Mississippi, river, principal river of the United States, c.2,350 mi (3,780 km) long, exceeded in length only by the Missouri, the chief of its numerous tributaries. The combined Missouri-Mississippi ...

Ohio, river, United States

(Encyclopedia)Ohio, river, 981 mi (1,579 km) long, formed by the confluence of the Allegheny and Monongahela rivers in SW Pa., at Pittsburgh; it flows northwest, then generally southwest to enter the Mississippi Ri...

Bear, river, United States

(Encyclopedia)Bear, river, 350 mi (563 km) long, rising in the Uinta Mts., NE Utah, and flowing in a U-shaped course NW through Wyoming and Idaho, then S into Utah to enter Great Salt Lake. A perennial stream, the ...

Connecticut, river, United States

(Encyclopedia)Connecticut, longest river in New England, 407 mi (655 km) long, rising in the Connecticut Lakes, N N.H., near the Quebec border, and flowing S along the Vt.-N.H. line, then across Mass. and Conn. to ...