Bad Ass Backyard Ultra - Rio Linda, CA

MAR
28
2026
Bad Ass Backyard Ultra in Rio Linda challenges runners to repeat 4.16 mile loops each hour at Dry Creek Parkway until one person outlasts the field. Affiliated event with swag, awards, and potential national and world selection chances.
Sat 28 Mar 2026
4.16 Mile Loop

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Event

Bad Ass Backyard Ultra is a backyard ultra held at Dry Creek Parkway in Rio Linda, California (northern Sacramento). The event was created in 2023 as a fatass event and became an official event in 2024 through a collaboration between Skybreaker Racing and Auburn Area Trail Runners. The event is listed as an affiliated Backyard event, making participants eligible for selection opportunities at national and world Backyard Ultra championships.

Format and rules

Runners complete repeated loops of the same course, with one hour allotted to finish each loop. Each new loop begins on the hour; a runner not in the start corral and ready at the hour is eliminated. Warnings are given 3, 2, and 1 minute(s) before each loop. All participants must start at the bell; no late starts are allowed. Competitors may not leave the course during a loop except to use restrooms, and no assistance is allowed after the bell until the loop is complete. Artificial aids, including trekking poles, are not permitted. Slower runners must allow passing. Each loop must be completed within the hour to count, including the final lap. The winner is the last person to complete a loop; if no runner completes one more loop than all others, there is no winner.

Course and logistics

Each yard (loop) is 4.16 miles with about 30 ft of elevation gain. Runners receive event swag if ordered during registration, and the winner, if there is one, receives a special award. Permits for the event may be pending; early registrants will receive a refund if permits cannot be issued. Volunteers are required to support the event. Visit the organization's website for the most recent information.

4 mi
4.16 Mile Loop