Bad Ass Backyard Ultra - Rio Linda, CA
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Bad Ass Backyard Ultra : Rio Linda, CA
This backyard ultra is held at Dry Creek Parkway near Rio Linda, California. Runners complete repeated 4.16 mile loops; each loop must be finished within one hour to count. New loops begin on the hour and participants must be in the starting corral at the bell and start together. Warnings are given three, two, and one minute before each loop start. No late starts are allowed.
During a loop, runners may not receive assistance or leave the course except for restroom use until the loop is complete. Eliminated runners and other non-participants are not allowed on the course. Artificial aids, including trekking poles, are not permitted. Slower runners are expected to allow passing. The winner is the last person to complete a loop; if no one can complete more loops than all others, no winner is declared.
B.A.B.U. is an affiliated Backyard event, and participants are eligible to earn selection opportunities for national teams and for the World Individual Championships at Big's Backyard in Tennessee. The event began as a fatass event in 2023, became an official collaboration in 2024, was associated with Singletrack Running in 2025, and is now produced exclusively by Skybreaker Racing. Event swag is available if ordered during registration, and the winner receives a special award when there is a winner. Volunteers are listed as needed. Course maps, GPX files, and photo galleries are available for reference. Visit the organization's website for the most recent information.
