Millersylvania State Park

By America's State Parks Editorial TeamFebruary 2, 2026 · Updated May 12, 2026

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

138 Campsites

16 Miles of Trails

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.

FAQ

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

Deep Lake sets the pace at Millersylvania: 5 mph, no wake, trolling motors only, and a hand-carry launch — no trailers. That keeps the 3,300 feet of park shoreline quiet for the two swimming beaches and the paddle rentals (kayaks, paddleboards, pedal boats) at the seasonal Lakefront Boats and Bites concession, Memorial Day through Labor Day. Anglers share the water; the park’s own brochure calls Deep Lake a draw for “boaters, swimmers and anglers” in that order.

On land, 8.6 miles of walking trails and 7.6 miles of bike trails wind through stands of old-growth cedar and fir — Old Growth Lane, the Perimeter Trail and the Fen Way Boardwalk are the named routes to look for on the map. The buildings are the other reason to slow down: the Civilian Conservation Corps built 17 structures here between 1933 and 1939, almost entirely by hand, and Washington State Parks names Millersylvania alongside Deception Pass and Moran as one of the best-preserved CCC parks in the state — 27 individual features, from the bathhouses and kitchen shelters down to the stone drinking fountains, sit on the National Register.

Best Time to Visit

The park runs year-round with seasonal hours (6:30 a.m. to dusk April–September, 8 a.m. to dusk in winter), and it takes camping reservations in every month. Summer is the lake’s season and the busy one; the concession, the beaches and the roofed-accommodation peak rates all run mid-May to mid-September. Off-season is where the old-growth forest earns its keep — the trails are near-empty, the cottage drops to its winter rate, and the CCC stonework looks its best in low light and rain.

Visitor Tips

Entry requires a Discover Pass: $10 per day or $45 per year — the annual pass rose from $30 on October 1, 2025, its first increase since 2011. The campground has 93 standard sites and 45 utility sites for RVs up to 60 feet, bookable 9 months ahead; statewide rates run $31–$43 for standard sites in peak season and $46–$56 for full hookups. The 1920s Lakeside Cottage sleeps six for $149–$169 a night in peak season (May 15–September 15) and $109–$129 the rest of the year, with a 2-night minimum on summer and weekend stays — as of September 2026. Groups of 90 to 150 can book the Retreat Center’s 16 heated cabins and dining hall at $17 per person per night.

The park sits 10 miles south of Olympia at 12245 Tilley Road S — I-5 Exit 95, then Maytown Road to Tilley Road. Dogs are welcome on leash throughout the park (not at the Retreat Center). The name, by the way, is the Miller family’s own coinage — their “Miller’s Glade,” rechristened Millersylvania, “wooded glade,” before they willed the land to Washington in 1921.

Fees, hours and facility details verified against parks.wa.gov on September 2, 2026. Fees change — confirm before you travel.

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).

About the Author

America's State Parks Editorial Team

America's State Parks is an independent online guide to state parks and other public lands in the United States. Our editorial team compiles park profiles from official agency and operator sources and other identified references, and follows our published editorial policy and review methodology. Where a profile shows a source-check date, that date applies to the detail it names. We correct errors when we find them or when readers report them.

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