National Natural Landmarks

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 ; Thurston County, WA

Year designated: 1966

Acres: 615

Ownership: State

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