Tolmie State Park

Tolmie State Park: Premier Underwater Scuba Diving Destination with Saltwater Marsh Ecosystem

Tolmie State Park offers visitors an exceptional 154-acre marine day-use experience on Nisqually Reach featuring 1,800 feet of saltwater shoreline, an innovative underwater park with artificial reef designed specifically for scuba divers, and diverse coastal ecosystems including saltwater marsh and forested lands. Located just minutes from Washington’s capital city Olympia, this unique destination combines accessible Puget Sound recreation with specialized diving facilities and comprehensive wildlife viewing opportunities through three miles of interpretive trails winding through estuary, marsh, and forest environments.

Tolmie State Park Fast Facts

Park Overview

Tolmie State Park showcases a remarkable combination of marine recreation and ecological diversity, positioned strategically on a split cove at the mouth of Big Slough where saltwater and freshwater environments create rich habitat supporting abundant wildlife and diverse recreational opportunities. The park’s distinctive character emerges from its pioneering underwater park with artificial reef constructed by volunteer scuba divers, making it a premier Pacific Northwest diving destination while simultaneously preserving critical saltwater marsh ecosystems that serve as vital habitat for migrating waterfowl and resident wildlife species. Named for William Fraser Tolmie, the Hudson’s Bay Company physician, botanist, and fur trader who served 16 years at nearby Fort Nisqually, the park connects visitors to both natural marine environments and the rich cultural history of early Pacific Northwest exploration.

Located on Nisqually Beach just eight miles northeast of Olympia with convenient access to Washington’s capital region, Tolmie State Park serves day-use visitors seeking authentic Puget Sound experiences without extended travel. The park’s comprehensive trail system leads visitors through diverse ecosystems from saltwater shoreline to interior forest, while specialized facilities accommodate both casual beachgoers and serious underwater enthusiasts exploring the artificial reef system.

Activities & Recreation

Facilities & Amenities

Tolmie State Park provides specialized day-use facilities including two group kitchen shelters with electricity, picnic tables, water, and sinks available by reservation, plus eleven sheltered and 20 unsheltered picnic tables on a first-come, first-served basis. Marine facilities feature five mooring buoys with overnight use permitted for boaters staying on their vessels, requiring moorage fees from 1 p.m. to 8 a.m. year-round. Additional amenities include two restrooms, outdoor amphitheater for educational programs, comprehensive trail system with interpretive opportunities, and the unique underwater park artificial reef system specifically designed and maintained by the regional scuba diving community for enhanced underwater recreation experiences.

Camping & Accommodations

No camping facilities are available. Tolmie State Park operates as a day-use only facility. Nearby overnight accommodations are available at Millersylvania State Park, featuring 120 tent spaces, 48 utility sites, group camping for 20-40 people, and a two-story Lakeside Cottage on Deep Lake accommodating six guests, plus an Environmental Learning Center accommodating up to 150 people in multi-bed cabin facilities with dedicated dining hall.

Planning Your Visit

Tolmie State Park operates seasonally with summer hours from 8 a.m. to dusk April 16 through September 15, and winter schedule from 9 a.m. to dusk Wednesday through Sunday September 16 through April 15. A Washington State Discover Pass is required for vehicle access, with annual passes available for $45 or daily passes for $10, plus moorage fees for boaters using the five mooring buoys. Visitors must respect private property boundaries as the public beach extends only to park boundaries, while dogs require physical control on leashes eight feet or shorter throughout all park areas including the beach. Scuba divers should coordinate with local dive shops for current artificial reef conditions and safety considerations.

What to Bring & Know

• Scuba diving equipment or arrangements with local dive shops for exploring the unique artificial reef system
• Shellfish harvesting gear and current Washington State fishing license for clamming and crabbing activities
• Respect for private property boundaries, as public beach access is limited to park property only
• Camera for capturing diverse wildlife in saltwater marsh and forest ecosystems
• Understanding of tidal conditions for optimal beach exploration and marine activity timing

Final Word

Tolmie State Park delivers an unmatched combination of specialized scuba diving opportunities, diverse marine recreation, and accessible coastal ecosystems, making it an essential destination for underwater enthusiasts and families seeking authentic Puget Sound experiences near Washington’s capital city.

This park is part of the Explore Washington State Parks Directory—showcasing all of Washington’s State Parks from the rugged Pacific coast to the Cascade peaks. Whether you’re camping under old-growth forests, hiking scenic trails, or discovering local history, we’re highlighting the places where people connect with the state’s incredible natural and cultural heritage—all year long.