Leadville Trail 100 Mile Run
Leadville, United States • 16-17 Aug 2026
Leadville Trail 100 Mile Run
The Leadville Trail 100 Mile Run is a high altitude, single day ultramarathon held in and around Leadville, Colorado. The course is a roughly 100 mile out and back route through the Colorado Rockies that starts and finishes in Leadville and uses forest trails and some mountain roads. The route reaches a high point at Hope Pass, listed at about 12,526 feet, and has more than 15,492 feet of cumulative elevation gain. The course low point is around 9,206 feet.
There are 11 staffed aid stations on course. Aid stations provide water, Neversecond energy gels and high carbohydrate drink mix, Skratch Labs hydration products, energy bars and chews, and a variety of solid foods such as bananas, figs, pretzels, chips, and soda. Drop bags may be placed at five locations on course: Mayqueen, Outward Bound, Half Pipe, Twin Lakes, and Winfield. Pacers are permitted beginning after the 62 mile point.
The event operates under special permits on public lands including San Isabel National Forest and the U.S. Bureau of Land Management. Minimum participation age is 18 on race day. Finishers who complete the course in under 30 hours receive the small belt buckle and those under 25 hours receive the big belt buckle. Entry options have included a lottery and published pricing for the Leadville Trail 100 Run. Visit the organization's website for the most recent information.