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Tartarus Backyard Ultra

Spokane, United States • 6 Sep 2025

The Tartarus Backyard Ultra is a unique endurance event held at Camp 7 in Riverside State Park, Spokane, Washington. It features two separate races: a running race with 4.1667-mile loops and a rucking race with 2.2-mile loops. Participants must complete each loop within an hour, starting a new lap every hour on the hour, continuing until only one runner and one rucker remain.

The course uses local trails and shifts to an out-and-back route on the Centennial Trail during evening hours. The event emphasizes self-sufficiency, with limited aid allowed, and offers a supportive atmosphere with camping nearby. Fundraising options are encouraged to support the cause. Visit the organization's website for the most recent information.

United States Washington Spokane

Race information

Website Registration
4 mi
Running Loop 4.1667 Miles
Rucking Loop 2.2 Miles
Visit the organization's website for the most recent information.
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