Grassroots Backyard Ultra
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GrassRoots Backyard Ultra - Okotoks, Alberta - June 27, 2026
The fifth edition of the GrassRoots Backyard Ultra takes place on June 27, 2026 in Okotoks, Alberta. The event features the Backyard Ultra Last Person Standing format and two timed events offered with limited capacity.
The course is a 6.71 km loop along the Sheep River pathway, including a short section of single-track dirt trail and 34 meters of elevation gain per lap. The loop uses public pathways and is an open course. Okotoks is about 20 minutes south of Calgary; nearby amenities include hotels, restaurants, family recreation, and Lions Park campground across the river.
Formats and distances
- BACKYARD15 15 hours, 100.65 km
- BACKYARD24 24 hours, 100 miles
Key race rules require runners to complete each 6.71 km lap within one hour, with a new lap starting at the top of each hour and warning whistles 3, 2, and 1 minute before each start. Runners must start moving at the bell and be in the starting corral before the next lap begins. No aid is allowed while on course from the moment the bell sounds. The final remaining runner must complete one additional lap to be named the winner. Minimum age is 16 years on race day.
Registration opens September 15, 2025 and closes May 31, 2026 or earlier if spots fill. There are no refunds. Transfers are permitted until 11:59 p.m. on June 1, 2026 for a $20 administration fee. The Last Person Standing prize is $500 plus an additional $250 if the course record is broken; the current record is 35 loops set in August 2024. Visit the organization's website for the most recent information.
