Seaquest State Park
🏆 Official Guide: Seaquest State Park — A year-round Washington park across from the Mount St. Helens Visitor Center — featuring 85 campsites + 5 yurts, 12+ miles of forested trails, the accessible Silver Lake Wetland Trail with volcano views, and a pedestrian tunnel to volcano exhibits.
Seaquest State Park in Castle Rock, Washington, is the gateway to Mount St. Helens — situated directly across Highway 504 from the Mount St. Helens Visitor Center, with the two connected by a convenient pedestrian tunnel. The 475-acre park offers year-round camping, extensive forested trails, and lakeside wetland boardwalks with views of the volcano that famously erupted in 1980.
Visitor Information
| Detail | Information |
|---|---|
| Location | 3030 Spirit Lake Hwy, Castle Rock, WA |
| Size | 475 acres |
| Campsites | 52 standard + 18 partial-hookup + 15 full-hookup |
| Yurts | 5 (sleep 5 each — bunks, futon, heater) |
| Pass Required | Washington Discover Pass (day-use) |
| Season | Year-round |
Activities
| Activity | Details |
|---|---|
| Camping | 85 sites + 5 yurts — forest setting |
| Hiking | 12+ mi through fir forest, wetlands, Silver Lake shore |
| Silver Lake Wetland Trail | ADA-accessible boardwalk — volcano + lake views |
| Mt. St. Helens Visitor Center | Eruption exhibits — connected via pedestrian tunnel |
| Bird Watching | Silver Lake — diverse waterfowl and woodland species |
| Nature | Fern groves, old-growth fir, wetland ecology |
Yurt Details
| Feature | Details |
|---|---|
| Capacity | 5 people — bunk bed (3) + futon (2) |
| Amenities | Heater, electrical outlets, end table |
| Cooking | Not inside — fire pit + picnic table outside |
| Linens | Bring your own |
| Pets | Yurt Y2 is pet-friendly (fee) |
Frequently Asked Questions
Can I see Mount St. Helens from the park?
Yes — the Silver Lake Wetland Trail offers views of Mount St. Helens across the lake. The Mount St. Helens Visitor Center, connected to the park by a pedestrian tunnel, provides exhibits on the 1980 eruption and the volcano’s ongoing geological activity. For closer views, drive Highway 504 further east toward Johnston Ridge Observatory.
What’s included in the yurts?
Each yurt includes a bunk bed (sleeps 3), a futon couch (sleeps 2), an electric heater, electrical outlets, and an end table. No cooking is allowed inside. Each yurt has an outdoor fire pit with a grate and a picnic table. Bring your own bedding, pillows, and cooking gear. Yurt Y2 allows pets for an additional fee.
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