State Park
~2 hr from Seattle
Seaquest State Park
Year-round Mount St. Helens base camp with 52 standard, 18 partial-hookup, and 15 full-hookup vehicle sites, showers, and a trailer dump.
Year-round Mount St. Helens base camp with 52 standard, 18 partial-hookup, and 15 full-hookup vehicle sites, showers, and a trailer dump.
Seaquest State Park provides a wooded, year-round base near Silver Lake and the Mount St. Helens Visitor Center. A pedestrian tunnel connects the park side of Spirit Lake Highway with the visitor-center area. The campground has 52 standard campsites, 18 partial-hookup sites, and 15 full-hookup sites, for 85 vehicle campsites. Washington State Parks lists showers, drinking water, a trailer dump, and limited availability for equipment up to 50 feet. Campsites can be reserved year-round.
Seaquest State Park sits beside Silver Lake near the Mount St. Helens Visitor Center. The park is a practical starting point for learning about the 1980 eruption and for exploring currently open destinations along Spirit Lake Highway; check road and monument conditions before longer day trips.
Practical guidance assembled from current operator maps, park pages, and clearly identified community observations.
Sites on the Silver Lake loop (1–30) are best for lake access and fishing. Hookup sites in the upper loops are well-equipped for extended stays. The park's location directly across from the Mt St Helens Johnston Ridge Observatory Visitor Centre (free day-use access) is the major draw. Sites 1–15 nearest Hwy 504 can have some road noise; request an upper loop site for quiet nights.
| 📍 Nearest Town | Castle Rock, WA |
| ⛽ Gas Station | 5 mi |
| 🛒 Grocery Store | 5 mi |
| 🏪 Costco | 50 mi |
| ☕ Starbucks | 15 mi |
| 🏕️ Nearest State Park | 22 mi |
Stock up in Castle Rock, WA before heading out — services get limited near the campground.
Ready to book?
Campsites reservable year-round; unreserved sites may be available first-come. Confirm current rules, site dimensions, and conditions with the operator. Booking and availability are handled externally.