Bad Ass Backyard Ultra - Rio Linda, CA

MAR
28
2026
A backyard ultra at Dry Creek Parkway near Sacramento where runners repeat a 4.16 mile loop each hour until only one remains. The affiliated event also offers eligibility for national team selection and the Big's Backyard world championships.
Sat 28 Mar 2026
4.16 Mile Loop

Always double-check with the organizer's website! This page may contain affiliate links.

Bad Ass Backyard Ultra - Rio Linda, CA

This backyard ultra is held at Dry Creek Parkway / Dry Creek Bike Trail in Rio Linda, California, north of Sacramento. The event follows the traditional backyard ultra format: runners must complete each loop within a fixed hour and begin the next loop on the hour from the start corral.

Each yard is 4.16-mile with about 30 feet of elevation gain. Warnings are issued three, two, and one minute before each new loop. All participants must be at the starting corral at the bell; late starts are not allowed. Except for restroom breaks, competitors may not leave the course until a loop is completed. No non-participants are permitted on course, including eliminated runners. Runners may not receive assistance after the bell until they finish the yard. No artificial aids including trekking poles are allowed. Slower runners must allow passing.

The winner is the last person to complete a loop; all others are recorded as DNF. If no runner can complete one more loop than anyone else, there is no winner. The event is an affiliated Backyard event, and participants are eligible to earn a spot on a national team for the Satellite Team Championships and for the World Individual Championships at Big’s Backyard in Tennessee.

Event production history: created in 2023 as a fatass event, run in collaboration with local groups in 2024, associated with Singletrack Running in 2025, and currently produced exclusively by Skybreaker Racing. Course maps, GPX files, event photos from prior years, and event swag options are provided by the organizer. Volunteers are used to support event operations. Visit the organization's website for the most recent information.

4 mi
4.16 Mile Loop