Birch Bay State Park is a 194-acre camping park with 8,255 feet of saltwater shoreline on Birch Bay and 14,923 feet of freshwater shoreline on Terrell Creek. The park is rich in shellfish resources and offers panoramic views of the Cascade Mountains and Canadian Gulf Islands.

The Terrell Creek Marsh is one of the few remaining saltwater / freshwater estuaries in north Puget Sound. A natural game sanctuary is at the park's north end.

The park is open year round and features excellent day use areas and facilities including numerous picnic tables and bathrooms.

Right inside the south entrance is a popular boat ramp for launching watercraft. A daily watercraft launching permit for $7 and a daily trailer dump permit for $5 is available at the park. Annual permits also may be purchased online, and inside the park when staff is available. Additional information can be found in the Boating Program.

Automated pay station
This park is equipped with an automated pay station for visitors to purchase a one-day or annual Discover Pass and boat launch permit.

Campsite Information
The park has 147 standard sites 12-by-12-feet in the forested camping area, 20 water and electric sites, two primitive sites, a trailer dump station, eight restrooms (one ADA), and 18 showers (two ADA). Maximum site length is 60-feet (limited availability). Campsites are reservable for arrival dates from May 15 - September 15.