Leadville Trail 100 Mile Run

Leadville Trail 100 Mile Run - Leadville, Colorado

The Leadville Trail 100 Mile Run on August 22, 2026 is an out-and-back ultramarathon held in and around Leadville on public lands and within the San Isabel National Forest under special use permits. The course covers 100 miles with more than 15,000 feet of elevation gain and reaches a high point of about 12,500 feet at Hope Pass. Terrain includes steep climbs such as Powerline, high-altitude passes like Sugarloaf, and technical sections on the Colorado Trail.

There are 11 aid stations spaced along the route. Aid stations provide water, energy gels and high-carbohydrate drink mixes, hydration products, bars and chews, Pickle Juice Company products, and assorted foods such as bananas and pretzels. Neversecond and Skratch Labs are noted on-course nutrition providers.

Entry options include a lottery that runs from December 1 to December 15, 2025 with results announced January 8, 2026. The published entry fee for the Leadville Trail 100 Run is $495 and the minimum participation age is 18 on race day. A deferral deadline is listed for August 21, 2026.

Support for runners is structured: there are four official crewing locations with access rules and reserved crewing spaces, and pacers are permitted beginning at Twin Lakes (mile 61.8 inbound) with required pacer bibs. Finishers who complete the course within set chip time thresholds receive belt buckles; chip time is used for buckle eligibility while gun time is used for course cutoffs. Awards are distributed at an awards ceremony and select items such as buckles and finisher hoodies are issued to official finishers. Visit the organization's website for the most recent information.