Mud Mountain Dam Marathon

MAY

30

2026

Run a fast, scenic downhill course along the Carbon River. The fully paved marathon and half marathon both finish at the historic McMillin Bridge. It's a Boston Marathon qualifying event set for May 2026.

Sat 30 May 2026

Buckley, Washington

Website Registration

Marathon Half Marathon

Always double-check with the organizer's website! This page may contain affiliate links.

Event Overview

The Spring - Mud Mountain Dam Marathon & Half Marathon takes place on May 30, 2026, in Enumclaw, Washington. The event offers two race distances.

Events

Spring - Dam Marathon
Spring - Dam Half Marathon

Course Details

Both courses are fully paved and run primarily downhill alongside the Carbon River.

The marathon begins at Mud Mountain Dam, which has an elevation of 1,400 feet. The route goes through farmlands and forested areas. It finishes in front of the historic McMillin Bridge at an elevation of 200 feet, for a net elevation loss of approximately 1,200 feet. The course is described as a Boston Marathon qualifying course.

The half marathon starts in the town of South Prairie at an elevation of 467 feet. It follows the paved Foothills Rail Trail, passing through farmland and forest before finishing in front of the McMillin Bridge at 128 feet elevation. This course has a net elevation loss of 339 feet. Visit the organization's website for the most recent information.

Marathon

Spring - Dam Marathon

Half Marathon

Spring - Dam Half Marathon