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Grand Coulee

Grand Coulee
Grand Coulee

Grand Coulee is an illustration of a series of geological events including outpourings of lava, advance and recession of glacial ice, retreat of waterfalls, and the cutting of the Columbia River channel.

Location: Grant County, WA

Year designated: 1965

Acres: 62,411

Ownership: Federal, State, Private

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Please remember, National Natural Landmarks (NNLs) are not national parks. NNL status does not indicate public ownership, and many sites are not open for visitation.

Last Updated: June 28, 2012