Leadville Trail 100 Mile Run
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Leadville Trail 100 Mile Run : August 22, 2026
The Leadville Trail 100 Run is a high‑altitude out‑and‑back ultramarathon held in Leadville, Colorado. The course measures 99.7 miles through the Colorado Rockies, with a total elevation gain of 15,492 feet. The route’s lowest point is about 9,206 feet and its highest point is Hope Pass at approximately 12,526 feet. The majority of the route follows forest trails with sections of mountain road and technical singletrack, and includes notable climbs such as Powerline and Sugarloaf.
There are 11 staffed aid stations along the course. On-course nutrition includes water, Neversecond energy gels and high‑carbohydrate drink, Skratch Labs hydration and bars, Pickle Juice products, and assorted foods such as fruit and salty snacks. Runners may use pacers after roughly the 62 mile point. Drop bags can be sent to five locations on course: Mayqueen, Outward Bound, Half Pipe, Twin Lakes, and Winfield.
Entry requires a minimum age of 18 on race day and places are distributed via an event lottery; the lottery window and result dates are published in advance. Event operations occur on public lands under special use permits from federal agencies and the San Isabel National Forest. Finishers who complete the course under 25 hours receive the big buckle and those under 30 hours receive the small buckle. Visit the organization's website for the most recent information.
