Leadville Trail 100 Mile Run
Leadville, United States • 22 Aug 2026
Leadville Trail 100 Run
The Leadville Trail 100 Run is a long distance out and back ultramarathon held in and around Leadville, Colorado. The 99.7 mile course traverses forest trails and some mountain roads and is routed on public lands under permits from the U.S. Bureau of Land Management and the San Isabel National Forest. The course reaches a high point near Hope Pass at about 12,526 feet and a low point near 9,206 feet, with roughly 15,492 feet of total elevation gain.
The event was first held in 1983 and uses a lottery and qualification system for entry. Minimum participation age is 18 on race day and the published entry fee for the Leadville Trail 100 Run is $495. Pacers are permitted starting after the 62 mile point.
There are 11 aid stations along the route. Aid stations supply water, energy gels and high carbohydrate drink mixes from Neversecond, Skratch Labs hydration, bars and chews, and assorted foods such as bananas, figs, pretzels, chips, and cola products. Drop bag, crewing, and pacer procedures are defined for specific access points including Twin Lakes, Outward Bound, Pipeline, and Mayqueen.
Belt buckle awards are based on chip time: finishing under 25 hours awards the big buckle and finishing under 30 hours awards the small buckle. Awards are presented after the event and some items are shipped to finishers. Visit the organization's website for the most recent information.