Spring - Mud Mountain Dam Marathon & Half Marathon
Sat, May 30, 2026, 7:00 AM PDT
- Location
- Enumclaw, WA
- 30525 SE Mud Mountain Rd, 98022
- Type
- RUN
Sign up and verify details on the organizer’s official page.
At a glance
Chase a Boston Qualifier on a beautiful, fully paved downhill course with stunning river and farmland views.
- Scenic
- Competitive
Scenic
CompetitiveGreat for: runners who like a competitive edge
The Mud Mountain Dam Marathon and Half Marathon offers a unique downhill running experience in Enumclaw, WA. Both courses are fully paved, guiding runners through picturesque farmlands and forested areas alongside the Carbon River. The marathon boasts a significant net elevation loss, making it an attractive option for those seeking a Boston Qualifier without common course penalties. Enjoy beautiful scenery and a smooth, fast route to the finish line near the historic McMillin Bridge.
What to expect
Run a fully paved course with a significant net downhill profile.Enjoy picturesque views of farmlands, forests, and the Carbon River.Experience a fast route designed for Boston Marathon qualification.
Standout details
- Boston Qualifier course
- Fully paved downhill route
- Picturesque river and farmland views
- Significant net elevation loss
Auto-drafted from the public listing — confirm details on the official event page before signing up.
Distances & registration
2 optionsRegistration for all distances is through the official signup link above.
- 13.1 Miles
Sat, May 30, 8:15 AM PDT · From $77.40
Opens Jan 1, 2026, 5:00 AM PST · Closes Jan 2, 2026, 6:59 PM PST
- 26.2 Miles
Sat, May 30, 7:00 AM PDT · From $88.10
Opens Jan 1, 2026, 5:00 AM PST · Closes Jan 2, 2026, 6:59 PM PST
Vibe Check
Push Potential
Push PotentialMixed surface + hills, longer distance
Based on terrain, weather, and distance data.
The course
- Mixed
- Hilly
- Timed race
From the organizer
May 30, 2026 – The Full Marathon Returns! We’re excited to announce that the Full Marathon is coming back on May 30, 2026, and will also be part of our September event. Start planning now for your next Boston Qualifier on this beautiful, fully paved downhill course, no tunnel, no dirt, no BQ penalty.
There’s no excuse not to do the dam thing!
Marathon The marathon course begins at Mud Mountain Dam (elevation 1,400′). Runners will follow a fully paved route through picturesque farmlands and forested areas, tracing the path of the Carbon River. The race finishes in front of the historic McMillin Bridge (elevation 200′), with a total net elevation loss of approximately 1,200′.
Half Marathon The Half Marathon begins in the scenic town of South Prairie (elevation 467′) and follows a gradual downhill route along the paved Foothills Rail Trail. Runners will enjoy a picturesque journey through farmland and forest, winding alongside the Carbon River and finishing in front of the historic McMillin Bridge (elevation 128′). The course features a net elevation loss of 339 feet.
Also in this area
Similar vibe nearby
Races nearby with a similar atmosphere.
Easier options nearby
Lower-difficulty races in the same state.
More demanding options nearby
Higher-difficulty races in the same state.