Leadville Trail 100 Run 2026
About This Event
The Leadville Trail 100 Run stands as one of ultrarunning’s most storied challenges, born from a 1983 effort to revitalize the town after its molybdenum mine closed. What began as a local economic boost has evolved into one of the world’s most respected 100-mile races, part of both the Grand Slam of Ultra-Running and Rocky Mountain Slam series.
This brutal out-and-back course starts at 4 am from Leadville’s 10,200-foot elevation, climbing to 12,600 feet at Hope Pass with over 18,000 feet of total elevation gain. The route weaves through San Isabel National Forest on a mix of forest trails and mountain roads, with challenging sections including the Powerline climb, Sugarloaf Pass, and technical stretches on the Colorado Trail. Hope Pass serves as the psychological and physical crux, demanding proper gear for potential snow, hail, and lightning even in August.
Twelve aid stations dot the course, with ten fully stocked and two offering hydration only. The high-altitude environment creates unique challenges, with temperatures swinging from 70s during the day to upper 20s at night, often accompanied by sudden weather changes that can include snow.
Entry requires strategy beyond simple registration. Options include the lottery system, qualifier events from the Leadville Race Series, charity slots, coaching packages, Life Time membership, or volunteering for series events. The exclusivity adds to the event’s mystique.
Finishers under 25 hours earn the coveted “big” buckle, while sub-30-hour finishers receive the “small” buckle. Both represent significant achievements in the ultrarunning community, marking completion of what many consider the ultimate test of high-altitude endurance.
Strambecco For the Love of Living
Strambecco is your guide to the world's best outdoor experiences — from epic gran fondos to backcountry ski adventures. We curate the events, share the stories, and connect you with the community.
Learn More