Tartarus Backyard Ultra

AUG
15
2026
Tartarus Backyard Ultra at Camp 7 in Riverside State Park invites runners and ruckers to tackle a loop each hour until one person remains or the field hits the 24 hour mark. Expect trail terrain, camping, camaraderie, an event shirt and prizes.
Sat 15 Aug 2026
2.2 Mile Loop 4.1667 Mile Loop

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Event overview

Tartarus Backyard Ultra is a backyard-ultra style run and ruck event at Camp 7, Riverside State Park, Spokane, WA. The event includes separate running and rucking races. Participants receive an event T-shirt and another acknowledgement item. The event awards a prize to the winner in each race.

Course and format

The races use a loop on local trails that begins at the old airstrip in Camp 7. Each loop must be completed within one hour. A new loop begins on the hour and participants must be standing in the start corral when the next loop begins to continue. If a participant leaves the corral at the start time or self-eliminates, they may not continue. Once the bell rings to start a loop, participants must remain on course except to use the portable toilets. Crews are permitted but runners must provide their own aid. A small personal area for a chair, cooler, and gear is allowed next to the start and finish. Camping is permitted nearby. Participants who do not finish must vacate the start/finish area.

Distances, special rules, and ruck requirements

  • 4.1667 miles (running loop)
  • 2.2 miles (rucking loop)

The Backyard 24 format ties everyone who reaches 24 hours; there is no single winner unless one person is the only finisher. Ruck core weight requirements: core weight is 30 pounds for participants over 150 pounds and 20 pounds for participants under 150 pounds. Core weight excludes water, food, and other equipment. Traditional rucks are required; vests are not allowed. Visit the organization's website for the most recent information.