Running News Daily

A landmark chapter was written in ultrarunning history on Friday as Bo Shelby delivered a performance for the ages at the renowned Bighorn Trail Run in Dayton, Wyoming.

For 25 years, the demanding 100-mile mountain race had resisted every attempt to be conquered in under 18 hours. The rugged trails, relentless climbs, punishing descents, and unpredictable mountain conditions had combined to make the barrier seem almost untouchable. Shelby changed that narrative in emphatic fashion.

Producing one of the finest performances ever seen on the course, Shelby stormed to victory in an astonishing 17:58:03, becoming the first athlete in race history to break the coveted 18-hour mark. In doing so, he not only secured the title but also established a new course record, setting a benchmark that many once believed was beyond reach.

The achievement carries added significance given the reputation of the Bighorn 100, one of North America's most respected ultramarathons. Winding through the breathtaking yet unforgiving Bighorn Mountains, the race features significant elevation changes across its 100-mile route and allows runners a generous 35-hour cutoff simply to reach the finish line. For most participants, earning a finisher's buckle is considered a triumph. Shelby, however, elevated the standard entirely.

What made the race even more remarkable was the depth of competition at the front. Ben Quatromoni also delivered a historic run, crossing the line in 18:10:31. His performance eclipsed the previous course record as well, making it the second-fastest time ever recorded at Bighorn despite finishing second on the day.

Completing an outstanding men's podium was John Dragon, who secured third place in 19:48:48 after a strong and resilient effort across the challenging mountain course.

In the women's race, Leah Handelman produced a commanding display to capture victory in 24:23:35, successfully navigating the demanding terrain to claim top honors.

As the Bighorn 100 celebrates a quarter-century of racing, the 2026 edition will be remembered as a defining moment in its history. A course that had stood unconquered beneath the 18-hour threshold for 25 years finally yielded, and in spectacular fashion. Shelby's record-breaking run did more than earn a victory—it redefined what athletes can dream of achieving on one of ultrarunning's most formidable stages.