Backyard Ultra - Summit Trail Racing

The Backyard Ultra hosted by Summit Trail Racing in Marble Falls, TX, is a unique "Last Person Standing" trail race featuring a 4.1667-mile loop that participants must complete every hour. Runners continue until only one remains, with the challenge of returning to the start line within 60 minutes each loop. The course includes a flat, wide 2.08-mile trail loop by day and a mix of trail and road at night to maintain variety.

The event offers primitive camping, RV access, and crew support at the start/finish area, with aid stations providing water, Tailwind, and snacks. This officially sanctioned race is part of the 2026 US Backyard Ultra National Team selection. Visit the organization's website for the most recent information.