Race Across the Sky — 100 miles at extreme altitude in the Colorado Rockies
Leadville Trail 100 Run takes place on August 22, 2026 in Leadville, CO.
Leadville Trail 100 Run is 99.7 miles with 15,490 ft of elevation gain.
Yes — entry to Leadville Trail 100 Run is decided by lottery.
Yes, crew is allowed at Leadville Trail 100 Run. Sign in to Trailrace to see crew access for each aid station.
Yes, pacers are allowed at Leadville Trail 100 Run.
Yes, Leadville Trail 100 Run allows drop bags.
Leadville Trail 100 Run has 11 aid stations along the course.
The overall cutoff for Leadville Trail 100 Run is 30h. Per-aid-station cutoffs are available to signed-in Trailrace members.
Other trail races within 46 miles
A 99.7-mile out-and-back through the Colorado Rockies, starting and finishing in the historic mining town of Leadville at 10,200 feet. The course climbs Hope Pass (12,526 ft) twice on the way to the Winfield turnaround, covering over 15,000 feet of elevation gain across a mix of forest singletrack and mountain roads. Runners have 30 hours to finish and earn one of the race's iconic belt buckles.
Some ultra experience recommended
Leadville, CO, United StatesAugust 22, 2026
Lottery open to all runners 18+. Multiple entry pathways available including the main lottery, community fund spots, and qualifier entries. See the Lottery & Qualification page for details.
Moderate trail conditions with some technical sections
| Location | Mile | Elevation |
|---|---|---|
Start Start | 0.0 | 10,135 ft |
Mayqueen (Outbound) Aid Station | 12.4 | 9,944 ft |
Outward Bound (Outbound) Aid Station | 23.3 | 9,537 ft |
Pipeline (Outbound) Crew Access | 26.3 | 9,649 ft |
Half Pipe (Outbound) Aid Station | 29.2 | 9,797 ft |
Twin Lakes (Outbound) Aid Station | 37.8 | 9,275 ft |
Hope Pass (Outbound) Aid Station | 43.1 | 11,742 ft |
Winfield Aid Station | 49.8 | 10,259 ft |
Hope Pass (Inbound) Aid Station | 56.7 | 12,526 ft |
Twin Lakes (Inbound) Aid Station | 61.9 | 9,239 ft |
Half Pipe (Inbound) Aid Station | 70.3 | 9,790 ft |
Pipeline (Inbound) Crew Access | 72.7 | 9,649 ft |
Outward Bound (Inbound) Aid Station | 76.5 | 9,511 ft |
Mayqueen (Inbound) Aid Station | 87.1 | 9,944 ft |
Finish Finish | 99.5 | 10,135 ft |
Sign in to see cutoffs, crew access, drop bags, and services for every aid station.
August in Leadville delivers the full range of Colorado high-country conditions. Mornings are typically clear and cool with temperatures in the 40s–50s°F at race start (4 AM). Daytime highs reach the upper 70s°F (~26°C), but afternoons bring frequent thunderstorms with lightning, hail, and occasionally snow. Above treeline — including the Hope Pass summit at 12,526 ft — lightning is a serious hazard. Overnight temperatures drop to the upper 20s°F (around -2°C), creating real hypothermia risk when combined with wind and wet conditions. Runners should carry warm layers and rain gear for the Hope Pass crossings regardless of the forecast.
No required gear specified
No recommended gear specified
No videos or race reports available for this event yet.
They ran out of Coke at Winfield. Unacceptable. Plus, I hear the crew bus situation for Twin Lakes is abysmal. But runnable, so there's that.
