Rocky's Backyard Ultra

OCT
10-11
2026
A mountain backyard ultra where runners complete a 4.167 mile loop every hour at about 8,000 feet until one person remains; $1,000 for the last runner and buckles at 100 miles.
10-11 Oct 2026
Backyard Ultra

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Rocky's Backyard Ultra

Rocky's Backyard Ultra is a mountain backyard ultra held near Rocky Mountain National Park at the YMCA of the Rockies - Estes Park Center in Estes Park, CO. The format requires completing a 4.167 mile loop each hour; runners who miss a start or fail to finish a loop in time are removed. There is no set distance and no overall time limit.

Each loop climbs roughly 500 feet at an elevation of approximately 8,000 feet and offers views of Longs Peak and Twin Sisters. Base camp between loops serves as the aid station; personal aid is not allowed while on a loop. The event is cupless, so participants must bring a bottle or cup or obtain a reusable cup available at registration for a fee.

Rules include no trekking poles, no pacers, no headphones during daylight hours, and a requirement to start each loop on time. The last runner remaining receives a $1,000 prize, and participants who reach 100 miles earn a finisher buckle. Packet pick-up occurs the day before and on race day at designated locations. Registration fees are listed by date with an early and a later rate. Visit the organization's website for the most recent information.

4 mi
Backyard Ultra

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Trail races at YMCA of the Rockies on May 22, 2027 offering 10K, 25K, and 50K on mostly runnable singletrack at 8,000 feet; the 50K includes 6,000 feet of gain.
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