Widely regarded as the toughest 100-miler in the US, and every step of it sits above 10,000ft. 100.5 miles through Colorado's San Juan Mountains, one big loop from Silverton that never really comes down.
One continuous loop from Silverton at around 9,300ft, crossing thirteen passes at 12,000 to 13,000ft and summiting 14,048ft Handies Peak, with roughly 33,000ft of climbing and equal descent. The direction reverses every year.
Highs around 22°C and lows around 6°C, but it has dropped to -1°C. Rain on 42% of days. Pack for the cold end, not the average.
We don't do generic plans. We combine deep knowledge of this race's demands with your recent training, then build a plan with you that progresses as you do.
Beina integrates directly with your existing tools to understand your current fitness, and synchronise your planned sessions.



