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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 loop 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 camping nearby. It also encourages fundraising, with incentives for participants who raise funds for 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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