Lost Sierra Endurance Race
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Course Information
The Lost Sierra Endurance Race offers three trail distances: 100K, 50K, and 25K. The event takes place in Downieville, California, within the northern Sierra Nevada.
The 100K is an out-and-back course starting in Downieville. It follows trails including the Third Divide, Pacific Crest Trail, and Lakes Basin Trails to Plumas-Eureka State Park near Blairsden and back. The route features river canyons, alpine ridgelines, and remote singletrack. It has a 20-hour cutoff and five unique aid stations. Mandatory gear includes a headlamp, space blanket, and water bottle. Pacers are allowed from mile 30 or mile 47.
The 50K is a point-to-point course starting at Plumas-Eureka State Park and finishing in Downieville. A shuttle is provided from Downieville to the start for a fee. The course includes mountain lakes, granite ridges, and forest trails. It has four unique aid stations.
The 25K is a loop course starting and finishing in Downieville, traveling through lower river canyons on the First, Second, and Third Divide Trails.
Event Details
The race date is July 25, 2026. The organizer is Bad Luck Run Club. A post-race celebration is held at the finish line. A donation program called The Unity Initiative offers participants a future race discount for donating to selected nonprofit partners, with donations matched up to a limit. Visit the organization's website for the most recent information.
