Butterfield Backyard Ultra
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Butterfield Backyard - May 16, 2026
The event takes place at Butterfield Trailhead Regional Park in Herriman, UT and is presented by Happy Trails Running. It offers two backyard-ultra options on the same loop format. Registration closes May 15 at 11:59 pm MT and late registration runs from April 16 to May 15. Packet pickup is available Friday at the Salt Lake Running Store, 8946 S State St, Sandy, UT; race day pickup begins at 5:30 am. Free parking is provided at the park.
- Backyard 6HR - 6 loops, total 25 miles, +3,072 ft elevation gain
- Backyard 12HR - 12 loops, total 50 miles, +6,144 ft elevation gain
Course and logistics
The race uses a 4.167-mile loop with +512 ft elevation gain per loop. The surface is 99% trail and 1% fire road. The route climbs slowly for the first ~2 miles, then descends on easy-to-follow trails that wind through dense foliage. The course is marked with pink flags, cones, and signs. Parking is free and organizers will send a recommended parking map the week of the race.
Awards and rules: all runners who complete at least one loop receive a finisher medal; runners who complete 12 loops receive a custom leather patch beanie. Overall places are decided by distance completed, with time on the last completed lap used as a tiebreaker. The final "Legacy" loop is timed and determines overall winners; it is timed even if only one runner remains. Rules include no artificial aid or pacers, finishing each loop within the hour to receive credit, and remaining in the starting area when a loop begins. Snacks and electrolyte drink are provided at the finish area; pizza will be ordered at the conclusion of the 12-hour event. Visit the organization's website for the most recent information.