Ready to race? Register directly on the official race website — opens in a new tab.
Register →Save this race to your wishlist, set a registration reminder, and build a full training plan on Trehko.
Fall - Mud Mountain Dam Marathon & Half Marathon is a half marathon running event held in Enumclaw, WA on Sep 19, 2026. It is a Boston Marathon qualifier. The course has a trail profile.
Trehko tracks registration status, entry fees, and deadlines for Fall - Mud Mountain Dam Marathon & Half Marathon and thousands of other endurance races. Use the app to set a registration reminder and build a training plan tailored to race day.
Browse by discipline: