San Juan Softie 100
Durango, United States • 14-15 Aug 2026
San Juan Softie 100 mile Ultramarathon
The San Juan Softie is a mountain ultramarathon held north of Durango, Colorado. The course covers approximately 104 miles on high alpine terrain with an average elevation around 10,282 ft and roughly 19,000 ft of total elevation gain. The highest point on the route reaches about 12,438 ft on the Colorado Trail.
The course runs through remote sections and includes a series of aid stations that vary between full service (hot food and more supplies) and basic support (water and snacks). Some aid stations allow crew access, pacers, and drop bags; pacers are permitted starting at the Cross Mountain aid station. A 38 hour overall cutoff applies.
Organizers require specific safety equipment for all runners: a rain jacket, two light sources, gloves, whistle, hat, water capacity, and a cup or bowl. Starting in 2026 satellite trackers are required and runners must be at least 18 years old. Navigation is assisted by marked ribbons, staked flags with reflective tape, and directional signs, and organizers provide GPX files and maps to support offline navigation. Sweepers follow the last runner and carry a satellite phone for remote assistance.
Prizes are awarded to the top three men and women, including cash awards. The event takes place on permitted public lands within San Juan National Forest and nearby counties. Visit the organization's website for the most recent information.