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Mima Mounds

Mima Mounds
Mima Mounds

The Mima Mounds area is a prairie containing unusual soil pimples of black silt-gravel. The mounds range in height from barely perceptible to a maximum of seven feet.

Location: Thurston County, WA

Year designated: 1966

Acres: 615

Ownership: State

For additional information see:


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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