The park's name, 'Kopachuck,' is derived from the Chinook Jargon word for 'cedar tree.'
The shoreline is an active area for studying intertidal marine life, including sea stars and clams.
The park encompasses a significant bluff structure that provides a geological vantage point over the Nisqually Reach.
The area was originally acquired by the state in 1960 to preserve access to the Henderson Bay shoreline.
The park provides habitat for the protected marbled murrelet, a small seabird that nests in old-growth and mature forests.
Kopachuck State Park is a 109-acre marine park located on Henderson Bay in Washington's Puget Sound region. The park features nearly 5,000 feet of saltwater shoreline, offering direct views of the Olympic Mountains across the water. The landscape consists of second-growth forest, steep bluffs, and intertidal zones characterized by sand and cobble beaches. Visitors frequently encounter harbor seals and diverse bird species along the coastline. The park area serves as a primary access point for exploring the low-tide marine environment of the bay. Hiking trails traverse the wooded areas, connecting the parking facilities to the beach access points.
The beach shoreline at low tide with the Olympic Mountains clearly visible in the background.
Check the tide charts before visiting to ensure you have maximum access to the shoreline and tidal pools.
Bring waterproof footwear if you plan on exploring the rocky sections of the beach.
Pack a high-powered pair of binoculars to spot wildlife and mountain ranges across the sound.
Attempting to swim or kayak without checking current local water safety alerts, as the water temperature in the Puget Sound remains cold year-round.
The park typically operates on a day-use basis; check official Washington State Parks alerts for seasonal beach access closures or storm damage updates.
Practice 'Leave No Trace' principles by packing out all trash; do not remove any shells or marine life from the beach.
