Butterfield Blitz Backyard

Event overview

The Butterfield Blitz Backyard takes place May 16, 2026 at Butterfield Trailhead Regional Park in Herriman, Utah, near the Oquirrh Mountains and Kennecott Mine. The event offers three timed backyard ultramarathon options:

• 4-hour - 16.7 miles (+2,048 ft)
• 8-hour - 33.3 miles (+4,096 ft)
• 12-hour - 50 miles (+6,144 ft)

Each distance is capped at 60 runners to limit trail congestion. Registration has early, normal, and late pricing tiers and late registration closes May 15 at 11:59 PM MT. Packet pickup is available the Friday before at the Salt Lake Running Store and there is race-day pickup. Free parking is available at the trailhead.

Course, format and rules

The event uses a 4.167 mile loop that runners must start on the hour and complete within the hour to receive credit. The loop is 99% trail and 1% fire road, with about +512 ft elevation gain per loop; the course climbs slowly for the first two miles, then descends. The Blitz Backyard format records and times every lap; placement is determined first by distance completed and then by cumulative time for ties. Live results show individual lap times and cumulative totals. Awards include a finisher medal for those completing at least one loop and a custom leather patch beanie for completing 12 loops. Food at the finish includes Tailwind electrolyte drink, Great Harvest Bread at the 4-hour conclusion, and pizza at the 8- and 12-hour conclusions. Rules prohibit pacers and artificial aids, and require runners to be in the starting corral when each loop begins. Visit the organization's website for the most recent information.

Events nearby