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.
Saturday, August 30, 2025
Registration
Opens
Aug 8, 2025, 12:00 PM
Closes
Aug 8, 2025, 12:00 PM
Registration Fee
$125, $95, $65, $35, $155
Official race details:
Logistics
Driving Directions
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.
Passes Required
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.
Policies
Cancelations & Deferrals
No refunds or bib transfers.
If canceling:
31+ days before = 50% race fee credit + 100% of extras
7–30 days = 50% race fee credit + 50% of extras
<7 days = no credit
Cancellation by Rainshadow due to weather, fire, or other = 50% credit.
Dogs
Leashed dogs may join runners or spectate at Kitchen #2. Pack out waste and yield to fellow trail users.
Kids
Kids can camp overnight for a $250 fee covering food and supervision. The pancake-flat 5K welcomes young runners alongside an adult, and youth discounts apply at checkout.
Volunteers
Rainshadow Running thrives on volunteer magic. Shifts range from early-morning check-in to full-day aid-station gigs. Perks include free food, finish-line drinks, and credit toward a future Rainshadow race. Sign up by emailing info@rainshadowrunning.com.
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.
Check out other
Rainshadow Running
races:
Deception Pass
25
K
50
K
|
WA
Dec 13, 2025
Hyak Halloween 25K
25
K
|
WA
Oct 25, 2025
Larch Madness
5
K
15
K
25
K
50
K
|
WA
Oct 18, 2025
Orcas Island
25
K
50
K
|
WA
Orcas Island Stage Race & Retreat
10
K
15
K
25
K
|
WA
Sun Mountain
20
K
20
M
50
K
50
M
|
WA
Teanaway Country
50
K
50
M
100
M
|
WA
Sep 20, 2025
White River
25
K
50
K
50
M
|
WA
Jul 26, 2025
Yakima Skyline Rim
25
K
50
K
|
WA
Apr 12, 2025
![](data:image/svg+xml,<svg display="block" role="presentation" viewBox="0 0 20 17" xmlns="http://www.w3.org/2000/svg"><g d="M 9.952 2.85 C 9.606 2.377 9.136 1.903 8.542 1.43 C 7.362 0.477 6.162 0 4.942 0 C 3.816 0 2.729 0.41 1.682 1.23 C -1.111 3.53 -0.571 6.913 3.302 11.38 C 5.242 13.607 7.459 15.607 9.952 17.38 C 12.452 15.607 14.672 13.607 16.612 11.38 C 20.486 6.913 21.022 3.53 18.222 1.23 C 17.176 0.41 16.092 0 14.972 0 C 13.752 0 12.549 0.477 11.362 1.43 C 10.996 1.723 10.649 2.047 10.322 2.4 L 9.952 2.85 M 2.442 2.17 C 3.269 1.523 4.102 1.2 4.942 1.2 C 5.882 1.2 6.836 1.59 7.802 2.37 C 8.289 2.763 8.682 3.16 8.982 3.56 L 9.952 4.87 L 10.922 3.56 L 12.102 2.37 C 13.069 1.59 14.026 1.2 14.972 1.2 C 15.799 1.2 16.632 1.523 17.472 2.17 C 18.366 2.903 18.792 3.783 18.752 4.81 C 18.692 6.47 17.576 8.51 15.402 10.93 C 13.836 12.67 12.019 14.323 9.952 15.89 C 7.886 14.323 6.069 12.67 4.502 10.93 C 2.329 8.51 1.212 6.47 1.152 4.81 C 1.126 3.777 1.556 2.897 2.442 2.17" fill="transparent" height="17.379999952316282px" id="AxX6s3ET9" width="19.984374960920544px"><path d="M 9.952 2.85 C 9.606 2.377 9.136 1.903 8.542 1.43 C 7.362 0.477 6.162 0 4.942 0 C 3.816 0 2.729 0.41 1.682 1.23 C -1.111 3.53 -0.571 6.913 3.302 11.38 C 5.242 13.607 7.459 15.607 9.952 17.38 C 12.452 15.607 14.672 13.607 16.612 11.38 C 20.486 6.913 21.022 3.53 18.222 1.23 C 17.176 0.41 16.092 0 14.972 0 C 13.752 0 12.549 0.477 11.362 1.43 C 10.996 1.723 10.649 2.047 10.322 2.4 L 9.952 2.85 M 2.442 2.17 C 3.269 1.523 4.102 1.2 4.942 1.2 C 5.882 1.2 6.836 1.59 7.802 2.37 C 8.289 2.763 8.682 3.16 8.982 3.56 L 9.952 4.87 L 10.922 3.56 L 12.102 2.37 C 13.069 1.59 14.026 1.2 14.972 1.2 C 15.799 1.2 16.632 1.523 17.472 2.17 C 18.366 2.903 18.792 3.783 18.752 4.81 C 18.692 6.47 17.576 8.51 15.402 10.93 C 13.836 12.67 12.019 14.323 9.952 15.89 C 7.886 14.323 6.069 12.67 4.502 10.93 C 2.329 8.51 1.212 6.47 1.152 4.81 C 1.126 3.777 1.556 2.897 2.442 2.17" fill="rgb(255, 0, 0)" height="17.379999952316282px" id="ql_EbdlRv" transform="translate(0 0)" width="19.984374960920544px"/></g></svg>)
