From the Organizer
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
Distances & Pricing
Race Location
About This Sport
From Endurance Grid's Founder
Endurance Grid is here to help you understand the sport, decide if it's the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer's event page.
With running, there's a distance for every fitness level, a community at every start line, and nothing beats the feeling of crossing a finish line you trained for.
Running is an endurance sport that rewards consistency, and showing up every week compounds in ways that will surprise you.
Running
From 5K to marathon, running races are the most accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Coming Up
More running races in CO
Frequently Asked Questions (FAQs)
- What is the High Lonesome 100?
- High Lonesome 100 is a running event held in Nathrop, CO. Learn more about the different endurance sports here.
- When and where is the High Lonesome 100?
- Friday, July 17, 2026 in Nathrop, CO at Co Rd 321, Nathrop, CO. Check the official event page for exact start times and wave schedules.
- How do I register for the High Lonesome 100?
- Registration is handled through their official registration page. Confirm pricing, distances available, and sign up there.
High Lonesome 100
Jul 17, 2026