About This Race
The 100K presents the full Kodiak challenge across all three climate zones of the San Bernardino Mountains, demanding both the endurance for sustained climbing and the technical skills for extended single track navigation. This distance serves as an ideal stepping stone for runners transitioning from 50K to 100-mile racing, offering a substantial mountain ultra experience without the extreme duration that comes with the longer format. Runners will experience the complete character arc of the Big Bear terrain while maintaining a pace that allows for appreciation of the diverse landscapes, from high desert approaches to the demanding alpine sections around Sugarloaf Mountain.
Practical Info
Cool mountain conditions typical of October in the San Bernardino Mountains at 7,000+ feet elevation
ONT - Ontario International Airport
Big Bear Lake offers mountain resort lodging options within walking distance of the downtown start/finish area
Best For
Notable Features
The 2026 UTMB World Series Americas Major offers double Running Stones and automatic qualification spots for 210 runners to the 2027 UTMB World Series Finals. The event serves as a dual qualifier for both UTMB and Western States Endurance Run, making it one of the most strategically valuable races in North American trail running. Set in downtown Big Bear Lake with festival atmosphere and community support throughout the weekend.