About This Race
The 100 miles represents the ultimate test of endurance at Kodiak, demanding runners navigate the complete spectrum of San Bernardino terrain multiple times while managing pacing through dramatic elevation changes and three distinct climate zones over potentially 24+ hours. This distance requires experienced ultrarunners comfortable with night running, complex fueling strategies, and the mental fortitude to persist through the inevitable low points that define hundred-mile racing. The extended time on course transforms familiar sections into new challenges as temperatures drop, fatigue accumulates, and the mountain environment tests every aspect of ultra-distance preparation.
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.