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High Lonesome 100
Friday, July 17, 2026 · Nathrop, United States
Distances
160.9km
Start location
Co Rd 321
Nathrop, CO
About this race
A high-flying endurance race through Colorado's Sawatch Range. With 23,500' of vertical gain and reaching 13,100', it's a challenging course. Run a loop through beautiful single track, navigating the Continental Divide and Colorado Trail. Pass through 2 ghost towns, conquer 5 alpine passes, and traverse remote basins and soaring ridges. Created in the spirit of classic 100-milers, the High Lonesome 100 delivers a true mountain race.