Conquer the Sierra Buttes.

Downieville, United States • 26 Jul 2025

The Lost Sierra Endurance Race invites participants to conquer the Sierra Buttes in Downieville, California, on July 26, 2025. Runners can choose from three challenging distances: 100K, 50K, and 25K, each offering a unique experience through the stunning Sierra Nevada landscape. The 100K race features an out-and-back course with multiple aid stations, while the 50K is a point-to-point journey from Plumas-Eureka State Park to Downieville. The 25K loop is designed for those seeking a less demanding yet beautiful trail experience. Post-race festivities include a BBQ, making it a memorable event for all participants. Visit the organization's website for the most recent information.

Race information

100 km
100k
50 km
50k
25 km
25k
Visit the organization's website for the most recent information.
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