The Columbia River pours more water into the
Pacific Ocean than any other river in North
or South America. In its 1,270 mile course to
the Pacific Ocean, the Columbia flows through
four mountain ranges -- the Rockies, Selkirks,
Cascades, and coastal mountains – and
drains a 259,000-square-mile basin that includes
territory in seven states (Oregon, Washington,
Idaho, Montana, Nevada, Wyoming, and Utah) and
one Canadian province. This vast river basin
was formed near the end of the last Ice Age,
by the Bretz Floods. Immense ice dams half a
mile high held back melting ice, creating a
huge lake in northwest Montana, called Lake
Missoula. Each time the ice gave way, massive
walls of water as high as four hundred feet
hurled boulders and icebergs seaward with a
great destructive force.
Today, the Columbia River is world famous for
its broad range of recreational opportunities.
Popular activities include water skiing, canoeing,
salmon fishing, swimming, day cruising, and
hiking in the surrounding mountains.
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