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Public Clam and Oyster Beaches

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The eastern portion of the park (including the swimming area) from the park boundary to the point just east of the day use area is CLOSED to shellfish harvest by the Department of Health from May-September each year.

Check Dept. of Health (DOH) for health restrictions on this beach


Mason County | Region 6 Information

Marine Area 12 (Hood Canal)

Twanoh State Park

Aerial Beach Photo (Dept. of Ecology)




Clams open September 1 through September 30

Oysters open year-round



This beach has been enhanced with clams.

This is a good beach for Manila clams, native littleneck clams, small butter clams and cockles. All four of these clam species can be found in a narrow band below the oyster beds. This band of clam habitat extends from southwest of the boat ramp east to the point (just west of the swiming area).

This is an excellent beach for oysters. The best spot for oysters is the west end of the park beach near the boat ramp in the "day use" portion of the park.

Oyster information


From the south (Shelton and Olympia) travel north on Highway 101. About 10 miles north of Shelton, look for the Highway 106 turnoff (to Belfair, Union, etc.) on your right. Proceed on Highway 106 for about 10 miles to Twanoh State Park. The day use park entrance is well marked on the highway and will be the first park entrance on the left side of the road.

From the north (Bremerton, Belfair) take Highway 3 to Belfair. Continue south through Belfair and take the Highway 106 exit (a right turn) and continue for about eight miles. Twanoh will be on the right. Access for the day use area is the second park entrance on the right. It is well marked on the highway.

From Tacoma travel north on Highway 16 across the Tacoma Narrows Bridge for about seven miles to the Highway 302 exit. Follow Highway 302 through Purdy and continue west for about 15 miles to where Highway 302 ends at Highway 3. Take a right and continue for about two miles to the Highway 106 exit. Take a left on Highway 16 and continue for about eight miles. Twanoh will be on the right. Access for the day use area is the second park entrance on the right. It is well marked on the highway.

Map to this point  

Twanoh State Park has restrooms, showers, potable water, camping, a boat ramp, dock, moorage floats, a swimming area, a playground and picnic areas. There is also a concession stand in the summer time.

Beach information last updated: August 31, 2015 @ 2:16pm

South Hood Canal

For individual beach information, including harvesting seasons, click on the yellow squiggles below.

South Hood Canal Beacon Point Eagle Creek Lilliwaup State Park South Lilliwaup DNR-48 DNR-47 West Dewatto (DNR-44A) North Hoodsport Hatchery Hoodsport Hatchery Potlatch Beaches Rendsland Creek Twanoh State Park Belfair SP

Yellow map areas (links) identify approximate public property boundaries and should not be considered legal property boundaries.
Many of these public beaches have no upland entrance and must be accessed by boat. Please respect adjacent private property.

This map is provided for informational purposes only. The accuracy of this map is not guaranteed.