When is High Lonesome 100?

High Lonesome 100 takes place on Jul 17, 2026. That's in 1 month.

Where is High Lonesome 100 located?

High Lonesome 100 is held in Nathrop, Colorado, United States.

What distances are available at High Lonesome 100?

High Lonesome 100 offers the following distances: 100M.

How do I register for High Lonesome 100?

You can register for High Lonesome 100 through the official registration page.

What is the typical weather for High Lonesome 100?

Based on historical data, you can expect temperatures between 51°F and 84°F on race day. There's approximately a 7% chance of precipitation.

High Lonesome 100 (100M) - Jul 17, 2026 | Nathrop, CO

The High Lonesome 100, set for July 17, 2026, in Nathrop, Colorado, is an iconic 100-mile ultra-endurance race that plunges runners into the heart of the majestic Sawatch Range. This challenging loop course boasts a staggering 23,500 feet of vertical gain, with an average elevation of 10,600 feet and a dizzying high point of 13,100 feet. Expect a relentless journey across 66% singletrack, mining roads, and gravel, all while navigating five alpine passes and traversing remote basins and soaring ridges. The course treats participants to 27 miles of the National Scenic Continental Divide Trail and 35 miles of the classic Colorado Trail, offering unparalleled views and a true test of grit.

Runners consistently praise the High Lonesome 100 for its breathtaking scenery and the exceptional organization, often describing it as one of the best-run events in ultra-marathoning. Aid stations are legendary, staffed by 100-mile race veterans and featuring unforgettable themes, like the festive, elf-clad volunteers at Monarch Pass. The race is renowned for its strong community spirit, fostering camaraderie among participants and volunteers alike. A unique aspect of the High Lonesome 100 is its commitment to equity, implementing a 50/50 gender split in its competitive lottery system to promote inclusivity in the sport. This race is a Hardrock 100 qualifier, demanding respect for its high-altitude nature and technical terrain, particularly the "Carnage City" section around Hancock Aid Station, which sits at 11,100 feet and allows pacers.

Typical race day conditions in July present highs around 84F and lows near 51F, with a 7% chance of precipitation, though runners should be prepared for rapid weather changes and the thin air above 10,000 feet. Starting and finishing at County Road 321, at the base of Mount Princeton, the High Lonesome 100 offers a coveted cowboy buckle to all who conquer its 37-hour cutoff. This is more than a race; it's an immersive mountain adventure designed for those seeking a profound test of endurance in a stunning, supportive environment.