160.4 kmTrail🇺🇸 Leadville, United States

Leadville Trail 100 Run

Saturday, 21 August 2027In 10 months · Start 04:00

The 'Race Across the Sky': 100 miles out and back through the Colorado Rockies, never below 9,000 ft and crossing Hope Pass twice.

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Facts checked 10 Oct 2026 against leadvilleraceseries.com.

Elevation gain

4,070 m

Mountain · ↓ 4,070 m

Start altitude

3,098 m

above sea level, from terrain data

Temp at start

5°C

Peaks around 11°C

Entry fee

≈ $495

Lottery + qualifying

Finishers

—

typical year

Course

Out and back

30h cut-off

Getting thereFly into COS (Colorado Springs), about 146 km from the start

Course map

A detailed route is not available for this race yet. The marker shows the race location.

Elevation profile

Mountain: about 4,070 m of climbing and 4,070 m of descent. A detailed profile isn’t available for this race yet.

Race-day weather

At start

5°C

Peak during race

11°C

Humidity

85%

Chance of rain

Wind

3 km/h

Race day in past years

Historical averages for 21 August ±3 days, 2016–2025, from 04:00 for 5 hours (70 days sampled). Source: Open-Meteo / ERA5.

What time could you run here?Adjust your goal time for this course’s hills and typical race-day weather.Race time calculator →

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<a href="https://irun42.com/race/leadville-100" title="Leadville Trail 100 Run on iRun42"><img src="https://irun42.com/badge/leadville-100.svg" width="300" height="120" alt="Leadville Trail 100 Run: course, elevation and race-day weather on iRun42" /></a>