Grass Lake Nature Park is a

nature reserve A nature reserve (also known as a wildlife refuge, wildlife sanctuary, biosphere reserve or bioreserve, natural or nature preserve, or nature conservation area) is a protected area of importance for flora, fauna, or features of geological or ...

Olympia, Washington Olympia is the capital of the U.S. state of Washington and the county seat and largest city of Thurston County. It is southwest of the state's most populous city, Seattle, and is a cultural center of the southern Puget Sound region. European ...

. The park has an area of . The central feature of the park is Grass Lake, a reservoir dammed in 1966. Swamp grass in the lake accounts for the name. The lake and surrounding

wetland A wetland is a distinct ecosystem that is flooded or saturated by water, either permanently (for years or decades) or seasonally (for weeks or months). Flooding results in oxygen-free (anoxic) processes prevailing, especially in the soils. The ...

has been owned by the City of Olympia since the 1980s. Amenities include a hiking trail.

References

Lakes of Thurston County, Washington Parks in Olympia, Washington {{ThurstonCountyWA-geo-stub