White River
25K50K50M
Rainshadow Running
Jul 25, 2026
Washington<p><br></p>
Deep-forest loops, lake-front vibes, endless smiles with distances for everyone
Overview
The Millersylvania Trail Races are as scenic as they are beginner-friendly. Set in the heart of Millersylvania State Park near Olympia, this event takes runners through a beautiful 5K loop of old-growth forest and lakeside views. The courses are mostly flat, with just 100 feet of elevation per loop, making them perfect for first-time trail runners, families, or anyone chasing a personal record.
Choose your adventure: 5K, 10K, 25K, 50K, or the 12-hour challenge where you run as many loops as you can. With a well-marked course, generous cut-off times, and an encouraging community atmosphere, this event is about fun, accessibility, and giving back. A portion of the proceeds supports the Interfaith Works Emergency Overnight Shelter, helping those in need across Olympia and Thurston County.
UTMB Index: falseTrail Sisters ApprovedCuplessVegan Friendly
300 participant limit
Course
Elevation Gain100 ft
Elevation Loss100 ft
Max Altitude203 ft
Cutoff Time12HR
A flat, forested 5K loop hugs Deep Lake’s eastern shore, weaving wide walking paths, soft pine-needle singletrack, a short wooden boardwalk, and tidy gravel roads. Expect 100 feet of gentle gain per lap, shady ferns, and spurts of sunlit shoreline. Red-hued cedar trunks frame every turn while chorus frogs provide the soundtrack.
Key Highlights
5K loop through old-growth forest and along waterways
Mostly flat terrain with ~100 ft gain per loop
Mix of wide trail, singletrack, boardwalks, and short gravel sections
Typically dry and smooth with a few roots or mud puddles
Loading course map…
Download GPX FileCutoff Details
Event | Overall Time Limit | Last Lap Must Start By | Finish Line Closes |
|---|---|---|---|
50K | 12HR | 7:30 PM | — |
25K | 12HR | 7:30 PM | — |
10K | 12HR | — | — |
5K | 12HR | — | — |
12HR | 12HR | — | 8:00 PM |
Aid Stations
Runners hit a fully loaded aid hub every 5K at Kitchen #2.
What's Included
Standard spread of water, Gnarly electrolytes, soda, fruit, PB&J, Oreos, candy, chips. Vegan-friendly. 🌱 This is a cupless race so bring your own flask/cup. First-aid & period products available.
Logistics
Schedule
Friday
12:00PM → Registration closes
Saturday
6:30AM → Bib pick-up and runner check-in opens
7:45AM → Course briefing
8:00AM → Mass start for all events
7:30PM → Final-lap deadline for 50K and 25K
8:00PM → Finish line closes, pizzas fly, raffle rolls
Bib Pickup
Pick up your bib Saturday from 6:30AM to 7:45AM at Kitchen #2 beside Deep Lake. Bring photo ID and your Discover Pass.
Drop Bags
Label a weather-proof bag at check-in and place it under the aid-station tarp. Bags are accessible every lap and must be reclaimed by 8:30PM. Unclaimed items are donated to Interfaith Works.
Crew & Pacers
Crew and spectators are welcome at the start-finish lawn and any public trail sector. Support is restricted to the aid-station zone. Display a Discover Pass and respect campground quiet hours.
Volunteers
Swag & Medals
Entry includes chip timing, lakeside pizza and beverage party, a donation to Interfaith Works, and professional photo access. Soft cotton tees and hoodies can be pre-ordered until August 1.
Chip-timed results
Scenic loop course through old-growth forest
Post-race party with pizza, beer, and refreshments
Well-stocked aid station (except for 5K)
Community-focused event supporting Interfaith Works Emergency Shelter
Getting There
Driving Directions
Passes & Permits
Discover Pass required for parking.
Parking
Every vehicle in the park must display a Washington Discover Pass. Use the day-use lot next to Kitchen #2. Follow event signs, park tight, and carpool when possible.
Lodging
Millersylvania State Park Campground offers tent and RV sites steps from the start line.
Olympia hotels and short-term rentals sit twenty minutes north. Tumwater and Tenino provide additional options within thirty minutes.
Olympia, washington
Requirements
Bib must be front-facing and visible. Carry a personal hydration system. Headlamps required for anyone expecting to finish after dusk.
Qualifying Races
No prior race qualifications required. This course is built for first-timers and seasoned legs alike
Mandatory Gear
Recommended
Headlamp for dusk or dark laps
Reusable cup or bottle for cupless aid station
Weather-appropriate layers
Policies
Race Policies
Charity & Beneficiary
A share of every entry fee and all additional donations support Interfaith Works Emergency Overnight Shelter, serving unhoused residents of Olympia and Thurston County.
Land Acknowledgement
The Millersylvania Trail Races take place on the traditional lands of the Coast Salish Peoples, including the Nisqually Tribe. We honor their history and stewardship of these lands and invite participants to respect and protect these natural spaces. Race entry fees are waived for tribal members; email info@rainshadowrunning.com for details.
About Rainshadow Running
Rainshadow Running is known for hosting some of the most scenic, challenging, and well-loved trail races in the Pacific Northwest. Since 2006, we've brought runners together on rugged mountain trails, coastal bluffs, and remote desert ridges, places that inspire awe and demand grit.
Our races are more than just miles; they’re celebrations of community, nature, and the wild beauty of the land. Whether you're chasing a PR or just here for the post-race party with wood-fired pizza and bluegrass music, you're part of the Rainshadow family.
Disclaimer
We make every effort to provide accurate and up-to-date information on Kåduka, but details may change. Please always confirm the latest information on the official race website. See something that needs correcting? Send us a note at feedback@kaduka.app