Leadville Trail 100 Run

Double out-and-back at average elevation of 10,200 ft. Hope Pass crossing at 12,600 ft each way (twice). Total climbing ~15,000 ft.

Mid-August in Colorado: 35–75°F range through the race. Below freezing at night and Hope Pass. Afternoon thunderstorms likely. Low oxygen at altitude.

10 crew-accessible aid stations; 13 total. Drop bags permitted. Crews are essential — meeting points at Twin Lakes, Winfield, and Hope Pass base.

Hope Pass at 12,600 ft is physically and nutritionally catastrophic. Running at altitude in oxygen debt means carb burn spikes and appetite collapses simultaneously.