Tartarus Backyard Ultra

AUG
14
2027
An hourly loop backyard ultra at Camp 7, Riverside State Park, with separate running and rucking races and last-person-standing winners.
Sat 14 Aug 2027
Ruck Event Run Event Backyard 24

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Tartarus Backyard Ultra : Spokane, WA

Tartarus Backyard Ultra is an endurance event held at Camp 7 in Riverside State Park near Spokane, Washington. The event runs two separate competitions: a running race and a rucking race. Each uses a repeating loop format where participants must complete the loop within one hour to continue.

Distances:

  • 4.1667 mile loop for runners
  • 2.2 mile loop for ruckers

The format is last person standing: the races continue in hourly loops until a single runner and a single rucker remain; the last person able to complete a loop is declared the winner in their division. At night the competition moves to an out-and-back section on the Centennial Trail and returns to the trail loop the following morning. Participants must be inside the start corral when the bell signals the next loop; late starts are not allowed and self-elimination ends a participant’s race. A start procedure uses whistle and bell signals and race director announcements.

Ruck rules set a minimum core weight: 30 pounds for participants over 150 pounds, and 20 pounds for those under 150 pounds; traditional rucks are required and vests are not permitted. Portable toilets are located near the start/finish, and nearby camping is permitted. Participants receive an event T-shirt and an additional acknowledgment. Fundraising may be used in lieu of paying the registration fee if minimum goals are met. Visit the organization's website for the most recent information.

Events nearby

Experience a historic skiing tradition at Mount Spokane State Park. This 10K event features wave starts for all speeds and includes dedicated categories for adaptive skiers on the scenic Nordic trail system.
Trail races at Riverside State Park on April 25, 2027 offering 5K to 50K courses, relays, and technical single track sections; registration is delayed.
Repeated 4 mile intervals in Spokane where runners continue each hour until only one remains; semi-stocked aid station and self-sufficiency encouraged.
A multi-event endurance festival in Spokane on June 19, 2027 featuring a 101.4 mile race, timed ultramarathons, a kid sprint, aid station support and crew access.
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