🌤 Weather at Seaquest State Park by season
| Spring | Summer | Fall | Winter |
|---|---|---|---|
| 38–68 °F | 50–81 °F | 37–75 °F | 34–51 °F |
Each range runs from the coldest monthly average low to the warmest monthly average high in that season (1991-2020 climate normals), measured at Toledo Faa Airport, 11 mi away, elevation 379 ft. Conditions at the park can differ from the station, especially where elevation differs — check a forecast before you go.
🏆 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.
More parks nearby: Jackson House State Park Heritage Site is within about an hour’s drive, while Matilda N. Jackson State Park Heritage Site lies within about an hour’s drive.
Camping reservations: Book campsites and cabins for Washington state parks online at washington.goingtocamp.com.
🐾 Dogs & Pets at Seaquest State Park
Park policy: Washington State Parks' own Seaquest Yurts page narrows the park's pet-friendly lodging to a single unit: pets are allowed in yurt Y2 with an additional fee, while the other four yurts stay pet-free. If you are travelling with a dog, reserve Y2 by name rather than assuming any yurt will do.
- Pets allowed?
- Only one of the five yurts, Y2, accepts pets, and the Visitor Center bars them
- Leash rule statewide rule
- 8 ft maximum leash required; pets must be under physical control
- Beaches & swim areas statewide rule
- Pets are not permitted on designated swim beaches
- Cabins & lodging statewide rule
- Pets are not allowed inside vacation houses but are permitted in designated pet-friendly cabins and yurts (e.g. Grayland Beach, Seaquest, Ike Kinswa — Cape Disappointment does NOT allow pets in its yurts), typically up to two pets, with a pet fee
- Pet fees statewide rule
- No day-use pet fee; $15 per night pet fee in pet-friendly cabins/yurts
- Park-specific rules
- The Mount St. Helens Visitor Center, reached from the campground through the Highway 504 pedestrian tunnel, admits no animals at all: a 2019 WAC revision keeps pets and emotional support companions out of the building, and trained service animals are admitted only after satisfactory clarification of their training.
- Statewide exceptions statewide rule
- Director-designated off-leash areas are exempt from the leash rule and are conspicuously posted
Are dogs allowed at Seaquest State Park?
Only one of the five yurts, Y2, accepts pets, and the Visitor Center bars them.
Beyond that, Washington’s statewide rules apply.
Rules verified July 2026 via parks.wa.gov. More: Washington state parks guide · Dog rules in all 50 states compared
Park Location
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