BestRacestrail · 100-miler
Leadville Trail 100
| Distances | 100-miler |
| Surface | trail |
| Field size | 700 runners |
| Founded | 1983 (43 years) |
| Elevation gain | 15,600 ft |
| USATF certified | N/A (trail) |
| Boston qualifier | No |
Researched from the race's own site and published results, last updated July 26, 2026.
The 2026 edition has been run. The organizer hasn't announced the next date yet. This page updates automatically when they do — the address stays the same, so a bookmark or link keeps working.
Running Leadville Trail 100 for a cause? Set up a free team page — rally your people, point donations straight to your charity.
Race-day weather
What the weather did on August 22 in each of the last 5 years, measured at Leadville Lake County Airport, 2 miles from Leadville.
| Year | High | Low | Rain |
|---|---|---|---|
| 2025 | 76°F | 42°F | 0.65 in |
| 2024 | 66°F | 43°F | 0.07 in |
| 2023 | 74°F | 41°F | none |
| 2022 | 63°F | 41°F | 0.03 in |
| 2021 | 69°F | 37°F | none |
Daily highs and lows, not start-line temperatures: most races start in the cool of the morning, closer to the low. Source: NOAA National Centers for Environmental Information, GHCN-Daily.
Stay near Leadville
Hotels and rentals in and around Leadville, CO.
Bookings made through this map may earn BestRaces a commission. It has no effect on rankings (how ranking works).
Run this one?
Tell other runners it's worth the entry fee. One tap, no email, no account.
Votes don't affect the ranking. Here's what does →