About
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LocationOlympia WA
SizeMedium — about a day
Acres196 acres

Grass Lake Nature Park is a 195-acre (79 ha) nature reserve in Olympia, Washington. Owned by the city since the 1980s, it is the second largest park in the city. The preserve is named after swamp grass that grows in the wetland areas of the park. Home to three lakes, or ponds, the site underwent an improvement project between 2024 and 2025 that included the expansion of a multi-use trail system and the installation of public art sculptures.

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