Leadville Trail 100

Leadville, CO, USAAugust 16, 2025

partly-cloudy-day Partly cloudy throughout the day.

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The Leadville Trail 100 Run (aka The Race Across The Sky or the LT100) is an ultramarathon held annually on rugged trails and dirt roads near Leadville, Colorado, through the heart of the Rocky Mountains. First run in 1983, the race course climbs and descends 15,600 feet (4,800 m), with elevations ranging from 9,200 to 12,620 feet (2,800–3,850 m). In most years, fewer than half the starters complete the race within the 30-hour time limit. Wikipedia

Area Map

Course Maps

FAQ

When is the 2025 Leadville Trail 100?

The 2025 Leadville Trail 100 will be held on Saturday August 16, 2025.

What is the time limit for the Leadville Trail 100?

The time limit for the Leadville Trail 100 is 30 hours.

Historical Weather

RunScore
Run Score: 7
Temp
58°F
Min/Max
38°/77°F
Dew
40°F
Days of Rain
1/2
Wind
2mph
Tap a row for details.
YearConditionsLow / HighRainRunScoreResults
2024
clear-night
36°/ 77°Light
Run Score: 8
2023
clear-night
40°/ 77°-
Run Score: 8