High Lonesome 100
About this race
The High Lonesome 100 is a high flying endurance race in the Sawatch range of the Colorado Rocky Mountains. With 23,500' of vertical gain and reaching an elevation of 13,100', it's a hell of a course. The race runs in a loop through some of the most beautiful single track in the state, and takes runners on the Continental Divide and Colorado Trail, through 2 ghost towns, over 5 alpine passes, through remote basins, and over soaring ridges. It's also run and staffed by experienced and quality individuals, so you'll get to be a part of a wonderful community. If you're looking for a true mountain race, created in the spirit of the classic 100 milers, then look no further.
Stats
- Entry fee: $465
- Start/Finish Location: County Road 321, Mount Princeton, Colorado (coordinates: 38.740282, -106.161237)
- Distance: 101 miles
- Average Elevation: 10,600'
- High Point: 13,100'
- Low Point: 8,150'
- Total Elevation Gain: 23,500'
- Cut off: 37 hours
- Course type: 66% single track, 21% mining roads, 10% gravel roads, and 3% paved roads
Pick your distance
Trail running
100 Miler
Includes: T-shirt, 750ml custom engraved bottle of Laws Whiskey, free professional race photos from Mile 90 Photography, live runner tracking, and a handmade-in-Colorado belt buckle (if you finish!).
Typical race-day weather
Based on 7 years of Open-Meteo archive data for this event's race dates in Nathrop, plus the 3 days either side.
The sun rises at 5:53 AM and sets at 8:27 PM local time (MDT) in Nathrop on July 17, 2026 — 14h 34m of daylight.
Course
No course map published yet.
The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.
Reviews
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Other races near Nathrop
Different organizers, within 40 miles, in the next three months
Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.
- Entries, prices, waves and inclusions — the event's official registration page
- Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
- Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
- Comparisons and counts — Race Discovery calendar, 2 Nathrop events
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