Estes Park's Backyard Ultra

Estes Park, United States • 14 Jun 2025

Estes Park's Backyard Ultra is a unique ultra-running event set against the stunning backdrop of Lake Estes, Colorado. Participants must complete a distance of 4.252 miles within one hour, every hour, until only one runner remains. This format continues without a predetermined end, making it a true test of endurance. The event supports Childcare and Family Services in Estes Park, and all participants receive a custom Fractel hat, access to a stocked aid station, and a designated space in the athlete village. The course features a paved bike trail with a 150-foot elevation gain per lap. Visit the organization's website for the most recent information.

Race information

4 mi
150 m+
4.252 Miles
Visit the organization's website for the most recent information.
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