162.5 kmTrail🇺🇸 Nathrop, United States

High Lonesome 100

Friday, 16 July 2027In 9 months · Start 06:00

A high-altitude 100-miler in Colorado's Sawatch Range starting at Mount Princeton, one huge loop over passes on the Colorado Trail and Continental Divide that reaches above 13,000 ft. A Hardrock qualifier with a lottery.

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Facts checked 26 Oct 2026 against highlonesome100.com, highlonesome100.com, runsignup.com.

Elevation gain

7,163 m

Mountain · ↓ 7,163 m

Highest point

4,008 m

above sea level

Temp at start

8°C

Peaks around 24°C

Entry fee

≈ $465

Lottery

Finishers

—

typical year

Course

Loop

37h cut-off

Getting thereFly into COS (Colorado Springs), about 127 km from the start

Plan your trip to Nathrop

Race weekends book up early. Searches are set for the race dates.

Hotels near the start lineThu 15 Jul – Sat 17 Jul · 2 nights · closest to the start firstSee hotels on Booking.com Flights to NathropArrive Wed 14 Jul, fly home Sun 18 JulSee flights on Google Flights

Things to do in NathropKlook Mobile data in United StatesAiralo Airport transfer from COSKiwitaxi Rent a carEconomybookings

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Course map

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

Elevation profile

Mountain: about 7,163 m of climbing and 7,163 m of descent. A detailed profile isn’t available for this race yet.

Race-day weather

At start

8°C

Peak during race

24°C

Humidity

55%

Chance of rain

Wind

5 km/h

16 July in past years

Historical averages for 16 July ±3 days, 2016–2025, from 06:00 for 5 hours (70 days sampled). Source: Open-Meteo / ERA5.

Finish times by age group

No data yet. We’re collecting age-group results race by race.

Runner reviews

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

Guides for this race

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

Around the same time

All races in July 2027 →

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