Leadville Trail 100

Leadville, CO, USA · August 21, 2027
partly-cloudy-day46°·74° high·Light·Dry
8
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Race Day Weather

partly-cloudy-day
46°at start
74° high
Light
Dry

Cool start, variable winds ahead

Runners will face a temperature range from 44°F at the start to a high of 73°F, necessitating conservative pacing early on. Winds will peak at 18 mph with notable headwinds between miles 5-8 and 10-11, impacting efforts on the climbs. With light rain expected throughout, hydration will be essential, especially during the challenging climbs from miles 11 to 12 and 21 to 22.

Race day forecast available in 330 days
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Pace Calculator

Distance: 100.0mi
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Race Info

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

FAQ

When is the 2027 Leadville Trail 100?

The 2027 Leadville Trail 100 will be held on Saturday August 21, 2027.

What is the time limit for the Leadville Trail 100?

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

What will the weather be like for the 2027 Leadville Trail 100?

The forecast calls for a high of 73°F and a low of 44°F with a 6% chance of rain.

Historical Weather

Based on 5 years of data
Avg Temp
52°F
L:40° H:73°
RunScore
8
Conditions
Rain Freq
60%
3 of 5 yrs
Wind6mph
Dew39°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
partly-cloudy-night
44°/73°Light
8
2025
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46°/68°Light
8
2024
clear-night
36°/77°Light
8
2023
clear-night
40°/77°-
8
2019
clear-night
35°/68°-
8