Mud Mountain Dam Marathon - Fall
Enumclaw, Washington, United States
Sep 19, 2026 - Saturday
Half-marathon, Marathon
Race Information
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!
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′.
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.
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👍 Run Pick of the Month - Snohomish Women's Run
📍 Everett, WA - May 9, 2026
An empowering, inclusive, and unforgettable Pacific Northwest race!
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😄 Why We Like This Run
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Run along the scenic Snohomish River in Washington on flat, fast, and well-supported 5K, 10K, or Half Marathon courses, perfect for personal bests or a motivating day on the run.
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Race Facts
Race Size: 500 - 1,000
Elevation: Downhill
Course Type: Road
Boston Qualifier: Yes
Kids Run: No
Where to Stay
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