Burn Ban - Level 1

Fires allowed in all designated fire pits and grills. Propane and gas grills allowed.

Park is Completely Closed

Start Date:

Seaquest State Park is CLOSED for major repairs. If you had reservations at this park you will receive an email with information about your refund. The park is expected to be closed until mid-February 2024.  Check back in February for updates on the expected re-opening.

Mt Saint Helens Mountain at Sunrise with bright orange sky and yellow sun stretching up over the horizon
Campers picnic at a campsite at Seaquest State Park
Tall pine trees with blue sky above
Primitive trail sign showing the way to the hiking trail
Seaquest Yurt with porch surrounded by tall trees in the shade

Seaquest State Park

3030 Spirit Lake Highway, Castle Rock, WA 98611

Set among the lush pines in the shadow of the storied Mount. St. Helens volcano, Seaquest boasts forested campgrounds, spectacular hiking and stunning mountain panoramas. The park is connected by a pedestrian tunnel to the popular Mount St. Helens Visitor Center, another worthwhile destination to explore.


  • Dogs Allowed on Leash
  • Fires Allowed in Designated Areas


First Day Hike Events

Winter Camping



Hiking, Walking, Rolling and Running

Interpretive Activities


Accessible Campsites

Accessible Restrooms

Drinking Water

Fire Pit

Park Ranger Station




Trash Service


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Kitchen Shelter

Picnic Shelters

Picnic Tables


Trailer Dump

Horseshoe Pits





Interpretive Center

Accessible Trails

Hiking Trails

Park features



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Mountain View

Seasonal Wildflowers


Wildlife Viewing


  • Dogs Allowed on Leash
  • Fires Allowed in Designated Areas

Map & visitor guide

46.3005, -122.8174

Interpretive opportunities

Seaquest is connected to the Mount St. Helens Interpretive Center by a short pedestrian tunnel. The Interpretive Center features a fun, interactive educational experience focusing on the May 1980 eruption of Mount St. Helens and subsequent regrowth. It also offers visitors a sweeping view of Mount St. Helen's National Volcanic Monument, 47 miles east of the park in the Gifford Pinchot National Forest.


Seaquest features more than 12 miles of hiking trails. A boardwalk trail beside the Interpretive Center connects visitors with wetland shoreline for an unobstructed view the volcano and surrounding woods.


Silver Lake at Seaquest is a shallow wetland lake that is home to many species of birds and wildlife.  

Campsite information

The park has 52 standard campsites, 18 partial hookup sites, 15 full hookups sites, three hiker/biker sites, one dump station, five restrooms (four ADA), and six ADA showers. Maximum site length is 50 feet (may have limited availability). The north, south, and mid-camp loops are in forest settings. Full hookup sites are available in the T-loop only. We suggest making reservations in the summer.

Group accommodations

The group camp for up to 25 visitors offers a covered shelter for tables, a tent area, a fire pit, two braziers, and hose bib. The camp is reservable May 15 - Sept. 15. The remainder of the year, the group camp is available on a first-come, first-served basis. To make a reservation call (888) 226-7688

Other overnight accommodations

The park has five yurts located in a wooded area of the park. Each yurt features sleeping accommodations for up to five visitors, a small end table, a 20 amp electrical outlet and heater. Outside is a picnic table and fire pit with grate. All yurts are heated, but visitors should take along blankets and warm clothing as evenings can be cool. Tents are not allowed on the yurt site, but awnings are okay. For more information, visit the cabins/yurts page.


A public access watercraft launch operated by the Department of Fish and Wildlife is located five miles east of the park on State Route 504.