Enumclaw, WA
Race Details
Fall – Mud Mountain Dam Marathon & Half Marathon

- 2026-09-19
Race Date
- Open
Registration Status
- Enumclaw, WA
Location
Event Schedule
Here is the latest schedule of events:
| Name | Distance | Type | Price | Start Time |
|---|---|---|---|---|
| Fall – Dam Marathon | 26.2 Miles | running_race | $155.00 | 9/19/2026 07:00 |
| Fall – Dam Half Marathon | 13.1 Miles | running_race | $145.00 | 9/19/2026 08:15 |
Fall – Mud Mountain Dam Marathon & Half Marathon Race Details
The latest details from your Race Directors:
September 19, 2026 – The Full Marathon Returns!We’re excited to announce that the Full Marathon is coming back in 2026, and will also be part of our. Start planning now for your next Boston Qualifier on this beautiful, fully paved downhill course, no tunnel, no dirt, no BQ time penalty!
There’s no excuse not to do the dam thing!
MarathonThe 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 MarathonThe 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.
