Millersylvania State Park features 138 campsites on beautiful Deep Lake, old-growth forests, and 16 miles of trails through towering cedar and fir groves—a Pacific Northwest escape!
Deep Lake
| Lake Info | Details |
|---|---|
| 🌊 Name | Deep Lake |
| 🏊 Swimming | Designated beach |
| 🚣 Boating | Non-motorized |
| 🎣 Fishing | Available |
138 Campsites
| Camping Info | Details |
|---|---|
| 🏕️ Standard | 93 sites |
| ⚡ Utility | 45 sites (RV up to 60ft) |
| 🏠 Cottage | Historic Lakeside Cottage |
| 👥 Group Camp | Available |
16 Miles of Trails
| Trail Info | Details |
|---|---|
| 🥾 Total | 16 miles |
| 🌲 Scenery | Old-growth cedar & fir |
| 🚴 Biking | Trails available |
| 🌸 Spring | Wildflower blooms! |
FAQ
Nearby Attractions
Olympia — 10 miles north — is the state capital with the Capitol Campus, Farmers Market (Thursday-Sunday), and Puget Sound waterfront. Tumwater Falls Park — 8 miles north — has waterfalls on the Deschutes River (the original Olympia Brewery site). Centralia/Chehalis — 15 miles south — provide services.
Are there old-growth trees?
Yes! The park protects stands of old-growth cedar and fir forests—a rare Pacific Northwest treasure.
What are the park hours?
Summer: 6:30am–dusk. Winter: 8am–dusk. Make reservations for peak season (Memorial Day–Labor Day).
How big can my RV be?
Up to 60 feet! There are 45 utility sites that accommodate large RVs on Deep Lake’s eastern shore.
🌲 Washington’s Forest Lake Retreat
Visit WA State Parks website.
Location & Getting There
Millersylvania State Park is located in Washington. The park’s coordinates are 46.9065, -122.9076. Check the park’s official website or your state parks app for detailed driving directions and GPS navigation tips.
Quick Facts
- Location: Washington
- Coordinates: 46.9065, -122.9076
- Activities: Hiking, Camping, Fishing, Wildlife Viewing
- Pets: Allowed on leash in most areas (check local rules)
Things to Do
Washington state parks offer incredible diversity — from rain-soaked old-growth forests and volcanic Cascade landscapes to arid canyonlands and island-dotted Puget Sound waters. Popular activities include hiking through temperate rainforests, beachcombing on wild Pacific shores, kayaking the San Juan Islands, camping beneath towering Douglas firs, fishing for salmon and steelhead, and cross-country skiing in winter.
Best Time to Visit
Western Washington is driest June through September. Eastern Washington enjoys more sunshine year-round. The San Juan Islands are best May through September. Mountain parks open as snow melts, typically July through October. Always carry rain gear west of the Cascades.
Visitor Tips
A Discover Pass ($30/year or $10/day) is required for vehicle access. Popular parks like Deception Pass book months ahead. Many island parks are accessible only by ferry — check schedules in advance.
Explore More Washington State Parks
Millersylvania State Park is one of many outstanding state parks in Washington. Discover more parks in our Best State Parks in Washington guide, or use our Park Finder to search by activity, location, or features.
Make it a road trip: Pair a visit with Tolmie State Park (within about an hour’s drive) or Willapa Hills (within about an hour’s drive).
Park Location
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