Bad Ass Backyard Ultra - Rio Linda, CA

The Bad Ass Backyard Ultra, held in Rio Linda, California, is a unique running event where participants complete 4.16-mile loops within one hour, starting a new loop every hour on the hour. The event, which began as a grassroots gathering in 2023, has evolved into an official race under the Singletrack Running organization, in collaboration with Skybreaker Racing and Auburn Area Trail Runners. Runners have the opportunity to qualify for national and world championships.

The event takes place at Dry Creek Parkway, and early registration is available, with a refund policy in case permits are not secured. Visit the organization's website for the most recent information.