Lost Sierra Endurance Race
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About the race
Lost Sierra Endurance Race is a multi-distance trail event held July 23-24, 2027 in and around Downieville, California, with the Summit VK+ starting in nearby Sierra City and finishing at the Sierra Buttes Fire Lookout. Courses travel local singletrack, alpine trails, and short sections of gravel or road.
Distances include:
- Summit VK+ 7 miles, 4,330 ft gain, gravel and singletrack, metal stairs at summit, 3-hour cutoff.
- 100K out-and-back via Sierra Buttes to Plumas-Eureka, 10,780 ft gain, five aid stations, 20-hour cutoff.
- 50K point-to-point from Plumas-Eureka to Downieville, 5,360 ft gain, four aid stations, 11-hour cutoff.
- 25K loop from Downieville through canyon trails, 2,330 ft gain, one aid station, 6-hour cutoff.
There are five unique aid stations stocked with water, hydration mix, and light food; Aid #1, #2, and #5 offer warm food. Ice is available at aid stations though supply may be limited at remote sites. Drop bag access and crew access vary by distance; 100K runners have multiple drop bag points and limited pacer support on the return, with rules on swapping and number of pacers.
The course surface is roughly 70% alpine singletrack, 20% mountain bike singletrack, and 10% dirt, gravel, or paved road. Mandatory items for the 100K include a space blanket, pack or hydration vest, and headlamp. Downieville and Sierra City are small and remote with limited lodging; tent camping at the start area is permitted but facilities are minimal. Visit the organization's website for the most recent information.