Black River - Mima Prairie Glacial Heritage Preserve

Contact Us

Office Hours:
8am - 5pm  Mon-Fri

Office Location:
9605 Tilley Rd SW
Olympia, WA 98512

Phone: (360) 786-5595
TDD: (360) 754-2933

Email Staff

Our parks are open daily from 9:00 AM until dusk.

The parking lot for the
Off Leash Dog Park is open daily from 7:00 AM until 5:00 PM.

The Black River-Mima Prairie Glacial Heritage Preserve, known as Glacial Heritage, is an excellent example of the Puget Prairie ecosystem which greeted the settlers of the 1800’s. Only 2.6% of this type ecosystem still exists. Thurston County Parks was fortunate to acquire this unique property.

With the exception of Thurston County Parks sponsored events, the park is currently closed to public use. Arrangements may be made in advance to access this site for educational or environmental activities.

Requests should be made by contacting Parks at (360) 786-5595.