The Great Divide Ultra

The Great Divide Ultra

The Great Divide Ultra is a trail running festival held June 6 to 7, 2026 in Divide, Colorado at Mueller State Park. The event offers these distances:

• 100 mile
• 100k
• 50k
• 25k

Races take place on a looped course through spring-fed meadows and granite rock formations with views of Pikes Peak and the surrounding mountains. The surface is entirely smooth single and double track, and the 100 mile course is composed of six 14.8 mile loops and one 10.5 mile loop. Elevation on course ranges from 9,189 feet to 9,743 feet. Total elevation gain is listed as 16,071 feet for the 100 mile and 8,500 feet for the 100k; the 50k and 25k gains are 4,200 and 2,100 feet respectively.

Aid stations are spaced about 4.3 to 6.1 miles apart, are crew accessible, allow drop bags, and are stocked with Tailwind, Muir Energy gels, snacks, fruit, soda, and warm food options. The 100 mile event has a 36 hour cutoff. A Dark Divide night run is scheduled to begin at sunset on Saturday, sharing trail with the longer races.

Pack pickup is scheduled the day before the event at Colorado GearLab in Woodland Park. Registration closes June 3 and includes a gender-specific race shirt, hat, personalized bib, finishers awards, and a post-race meal. Visit the organization's website for the most recent information.