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Mud Mountain Dam Half Marathon / 5K

📅 September 18, 2027 (estimated date)📍 Enumclaw · United States

⚠️ 2027 edition: provisional information

The date is estimated from the 2026 edition (September 19, 2026), on the same day of the week. Courses, start times, fees and description are carried over from the previous edition: check them on the official website. This page will be updated as soon as the organizer publishes them.

Available distances

26.2 mi13.1 mi

About

The Mud Mountain Dam Half Marathon / 5K in Enumclaw, Washington, holds its fall edition on September 18, 2027, along the Foothills Trail. The marathon (26.2 miles / 42.2 km) starts at 7 a.m. and the half marathon (13.1 miles / 21.1 km) at 8:15 a.m., and the event also features a 5K.

The half marathon starts in South Prairie and follows a paved route through open farmland and lush forest, finishing near the iconic historic McMillin bridge. With its net downhill profile, the course suits runners looking to pick up the pace. For athletes who favor speed and precision, the 5K is held on the Foothills Trail, starting and finishing near the McMillin Foothills Trail Bridge.

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