Mima Mounds, Natural mound formation in Thurston County, United States.
The Mima Mounds Natural Area Preserve contains hundreds of dome-shaped earthen formations measuring between 3 to 50 meters in diameter and up to 2 meters in height.
The National Park Service designated Mima Mounds as a National Natural Landmark in 1966, acknowledging its geological importance among Washington state's natural landscapes.
The name Mima comes from Chinook Jargon language, indicating a location meaning 'a little further along' or 'downstream' in native terminology.
Visitors can access the preserve through a half-mile paved trail and two additional miles of gravel paths, with an observation deck providing educational opportunities.
Scientists continue researching multiple theories about the mounds' formation, including pocket gopher activity, seismic events, and wind-deposited sediment accumulation patterns.
Location: Washington
Location: Thurston County
GPS coordinates: 46.89860,-123.05000
Latest update: May 27, 2025 09:59
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