Conquer the Sierra Buttes.

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. All finishers will receive commemorative items, and a post-race BBQ will celebrate their achievements. Visit the organization's website for the most recent information.