Lost Sierra Endurance Race

Embark on an extraordinary adventure at the 2027 Lost Sierra Endurance Race, taking place from July 23 to 24 in Sierra City and Downieville, California. This race offers four distinct challenges: Summit VK+, 100K, 50K, and 25K, each designed to test your endurance against the rugged beauty of the northern Sierra Nevada.
The weekend kicks off with the new addition for 2027—the Summit VK+ on July 23. This grueling 7-mile climb from Sierra City to the historic Fire Lookout atop the Sierra Buttes offers a breathtaking ascent, gaining an impressive 4,300 feet of elevation in just seven miles. The summit rewards runners with panoramic views of the Lakes Basin and beyond before they catch a free shuttle back down to Sierra City.
For those seeking the ultimate challenge, the flagship 100K race is one of California's most demanding ultra races. Starting from downtown Downieville on July 24, this out-and-back course follows legendary trails like Third Divide and Pacific Crest Trail through Plumas-Eureka State Park before turning back to finish in Downieville. The route features stunning alpine ridgelines, mountain lakes, and dense forest trails that will push you to your limits.
The 50K race begins at Plumas-Eureka State Park on July 24, offering a point-to-point course through the Sierra Buttes with breathtaking terrain along the way. Runners are shuttled from Downieville to PESP for an early start and must navigate rugged trails before crossing the finish line in Downieville.
The more accessible yet still challenging 25K race starts and finishes in downtown Downieville on July 24, taking runners through river canyons via First, Second, and Third Divide Trails. This course is ideal for those looking to experience the region's beauty without tackling an ultra distance.
Each event features unique aid stations strategically placed along the route, providing essential support throughout your journey. The post-race celebration at the finish line offers a well-deserved respite after conquering these challenging courses.
Join fellow endurance enthusiasts and embrace the raw wilderness of California’s Sierra Nevada in one of the most scenic trail races you’ll ever experience.