Mud Mountain Dam Marathon
Always double-check with the organizer's website! This page may contain affiliate links.
Fall - Mud Mountain Dam Marathon & Half Marathon
The Fall - Mud Mountain Dam Marathon & Half Marathon takes place on Saturday, September 19, 2026 in Enumclaw, Washington. The event location is listed as 30525 SE Mud Mountain Rd, Enumclaw, WA 98022.
The event includes a full marathon and a half marathon. The full marathon returns in 2026 and is presented as a fully paved downhill course and a Boston Qualifier; organizers note no tunnel, no dirt, and no BQ time penalty.
- Marathon: begins at Mud Mountain Dam; net elevation loss approx 1,200 feet.
- Half Marathon: begins in South Prairie; net elevation loss 339 feet.
The marathon course begins at Mud Mountain Dam (elevation 1,400 ft). Runners follow a fully paved route through farmland and forested areas alongside the Carbon River, finishing in front of the historic McMillin Bridge (elevation 200 ft).
The half marathon begins in South Prairie (elevation 467 ft) and follows the paved Foothills Rail Trail. The route passes through farmland and forest, winds along the Carbon River, and finishes in front of the historic McMillin Bridge (elevation 128 ft). Visit the organization's website for the most recent information.
