Black Hills Backyard Ultra

The Black Hills Backyard Ultra returns to Spearfish, South Dakota on September 12th, a unique endurance challenge that draws runners from across the region for an intense day of racing in the scenic Big Hill Loop trails.
Participants gather at Tinton Road (FS 134) early morning as temperatures hover around comfortable mid-70s Fahrenheit. The course is set within the wide and smooth trails of Big Hill, originally developed for cross-country skiing but now offering ample space for running and passing. Each loop measures precisely 4.167 miles with a notable elevation change that trends downward nearly 200 feet in the first half before climbing back up to complete another lap.
This event has been hosted by the Black Hills Runner's Club, a local non-profit organization focused on encouraging fitness within the community for over two decades. The club operates under special permission from the US Forest Service and uses this unique format as both an endurance test and a celebration of running culture in South Dakota’s rugged beauty. Runners are drawn to its rigorous standards and the camaraderie that forms among competitors pushing each other through long hours.
Runners tackle Big Hill Loop A, which includes a .6-mile out-and-back section on Loop D, ensuring the exact distance required for each loop—4.167 miles—with 375 feet of elevation gain or loss per circuit. The trails are wide and smooth, allowing ample space for passing. Each lap begins at the highest point on the course, descending before climbing back to start a new round in strict hour-long intervals dictated by warning whistles.
Weather conditions vary slightly with an average UV index around 5 (moderate), translating into generally clear skies but potential sun exposure requiring protective measures like sunscreen and sunglasses for long-duration events. Temperatures typically stay within the comfortable range of mid-60s to low-70s Fahrenheit, providing ideal running weather without excessive heat or humidity.
Registration can be completed through the event’s official page at https://ultrasignup.com/register.aspx?did=137595, with fees set at $80 for the main race entry. Bib pickup occurs on-site near Tinton Road (FS 134) from September 12th starting at 6:30 AM local time where participants must show a photo ID and their confirmation email or receipt.
Start location is precisely marked along Tinton Road, accessible via Forest Service Route 134. The event requires runners to be 18 years of age or older due to the rigorous nature of the competition. Newcomers should arrive early with adequate hydration, nutrition, and layers for changing weather conditions as dictated by race rules.
The Black Hills Backyard Ultra in Spearfish, South Dakota on September 12th is a testament to endurance running culture within the region’s stunning landscapes, drawing athletes from across South Dakota who seek both personal challenge and community camaraderie.