| Mima Mounds Natural Area Preserve | |
| Iucn Category: | III |
| Map: | USA Washington |
| Relief: | 1 |
| Location: | Southwest Washington, Washington, United States |
| Nearest Town: | Thurston County |
| Coordinates: | 46.89°N -123.05°W |
| Area Acre: | 637 |
| Established: | 1976 |
| Governing Body: | Washington Department of Natural Resources |
Mima Mounds Natural Area Preserve is a state-protected Natural Area in southwest Washington state, United States. The preserve includes some of the Washington mima mounds, the origin of which still is not fully understood.[1] The site comprises 637acres of Garry oak woodland, oak savanna, and prairie grasslands.[2] [3] Several state and federal endangered species of butterfly depending on the unique prairie conditions can be found in the preserve, including Mardon skipper, zerene fritillary, Puget blue and Taylor's checkerspot.[4]
In 1966, the mima mounds were designated a National Natural Landmark.