Black Hills Backyard Ultra

Black Hills Backyard Ultra

Black Hills Backyard Ultra is a backyard ultra event held in Spearfish, SD on September 12, 2026. The race uses a counter-clockwise loop called Big Hill Loop A with a 0.6 mile out and back section of Loop D so each circuit equals 4.167 miles. Each loop includes about 375 ft of elevation gain and loss. The start and finish are located at the high point of the course; the first half of each loop descends nearly 200 feet and the second half climbs back up.

The event follows the last runner standing format with a new loop starting promptly every hour. Key rules include mandatory presence in the starting corral when the bell rings, no outside aid during a loop, no trekking poles, and no pacers. Volunteers and photographers may be on course; spectators must remain in the aid station area or the nearby meadow.

An aid station at the start/finish will provide hot and cold food, water, Tailwind, ice, gels, snacks, and some cooked items over the day and night. Free dispersed camping is available nearby subject to Forest Service rules. Facilities at the trailhead are limited to a vault toilet and there is no WiFi or cell service at the trailhead.

The event is hosted by the Black Hills Runner's Club, a 501(c)(3) nonprofit operating under a conditional use permit from the US Forest Service.

Milestone awards include: Visit the organization's website for the most recent information.

• 7 laps ultramarathon 29.16 miles
• 12 laps 50 miles
• 15 laps 100K plus
• 24 laps 100 miles