Tolmie State Park, State park in Thurston County, United States

Tolmie State Park is a 154-acre public recreation area on Nisqually Beach on Puget Sound, eight miles northeast of Olympia. It has 1,800 feet of saltwater shoreline at the mouth of Big Slough, forest land, a saltwater marsh, and three miles of trails.

Washington State acquired the park land from Charles and Ola Jones in 1965 and named it after William Fraser Tolmie, a Hudson's Bay Company officer stationed at Fort Nisqually. In the 1970s and 1980s, more than 100,000 tires were placed offshore as an artificial reef to boost aquatic wildlife for recreational fishing; the bundles broke apart after their polypropylene twine dissolved, and removal began in late 2024.

The park takes its name from William Fraser Tolmie, a Hudson's Bay Company officer who kept records of the region's plants and wildlife while stationed at Fort Nisqually. Visitors today hike three miles of trails through forest and along the saltwater marsh at Big Slough, and watch birds over the shoreline.

The park offers two kitchen shelters with electricity and cooking facilities that can serve groups up to 50 people each. More than 30 picnic tables are scattered throughout the grounds for families wanting to spend leisure time.

The artificial reef off the park's shore was built in the 1970s and 1980s from more than 100,000 bundled tires, part of a Puget Sound effort to boost aquatic wildlife for recreational fishing. The polypropylene twine holding the bundles dissolved, the tires scattered, and removal began in late 2024.