Millersylvania Retreat Center

The Millersylvania Retreat Center is a group camp on the shore of Deep Lake inside Millersylvania State Park, run by Washington State Parks. It sleeps up to 150 people in heated cabins, with a recreation hall and a large, fully equipped kitchen. In 2026 it costs $17 per person per night, with a minimum of 90 guests from May to September and 50 from October to April.

What Is There

Sleeping. Sixteen heated cabins with restrooms nearby, plus three heated cabins with their own restrooms and showers. The park brochure says the 16 cabins have eight beds each. Beds have mattresses, but linens aren't provided, so bring sleeping bags or sheets.

Recreation hall and kitchen. The hall has a large, fully equipped kitchen with a walk-in refrigerator, a reach-in freezer and a walk-in pantry. Pots, pans, dishes, utensils, cleaning supplies, tables and chairs are included. The brochure says the lodge and kitchen are accessible.

Outdoors.

• Two sheltered outdoor classrooms, an open-air barn and an amphitheater with a fire pit.
• A big field for soccer and dodgeball, half-court basketball, volleyball, tetherball and horseshoes.
• Swimming, fishing and canoeing on Deep Lake. A canoe or paddleboard is included with the rental.
• Miles of hiking trails, a fitness trail and wildlife viewing. See hiking.

2026 Rates

• Overnight rate: $17.00 per person, per night.
• May to September: up to 150 guests, minimum 90. Deposit $1,530 before tax.
• October to April: up to 150 guests, minimum 50. Deposit $850 before tax.
• Day use: $6.00 per person, per day, with minimums and maximums.
• Reservation fee: $10, non-refundable.

You pay the minimum even if fewer people come. The deposit (one night at the minimum, plus the reservation fee) is due within three weeks with the signed contract. The final bill is figured on actual attendance at check-out. For 2027 the overnight rate is $17.51.

How to Book

1. Download the Reservation Request Form from the Washington State Parks retreat center page.
2. Email it to Retreat.Centers@parks.wa.gov. Requests aren't taken by phone.
3. If your dates are open, State Parks sends a contract. Sign it and return it with the deposit within three weeks.

Questions: (360) 902-8600. You can also ask the park to schedule a tour.

Rules to Know

• Arrival is 3 p.m. and departure is 11 a.m. No early arrival or late departure from July 1 to August 31.
• A group representative, 21 or older, must be there from check-in to check-out and keep daily attendance.
• No pets at the retreat center.
• Firewood isn't provided; ask the park about buying it locally.
• Bring your own first-aid kit.

Who It Suits

Schools, churches, scout troops, family reunions and nonprofit retreats that want lake access, cabins and a kitchen in one place, 20 minutes from Olympia. For smaller groups, the park's group camp (20 to 40 tents) and the Lakeside Cottage (six guests) may fit better. See camping.