Relentless Run & Ruck Challenge
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Relentless Run & Ruck Challenge
The Relentless Run & Ruck Challenge is a timed trail event on a closed 5K loop at Camp Greenough in Yarmouth Port, Cape Cod on October 24, 2026. Participants choose a distance and whether to run or ruck; divisions are separated by Run and Ruck and by male and female categories.
Distances:
- 5K: One loop.
- 10K: Two loops.
- Six-hour challenge: Complete as many 5K loops as possible in six hours.
Ruck divisions require mandatory dry weights of 30 lb for men and 20 lb for women. Required weight must be non-consumable, non-wearable, and carried on the back in a backpack or ruck. Plate carriers, sling bags, duffel bags, and trekking poles are not allowed. A mandatory ruck weigh-in occurs before the event and at the finish; extra carried supplies count as additional weight.
Ranking and awards follow clear standards: 5K and 10K are ranked by fastest finish time, and the six-hour challenge is ranked by total completed distance with only complete laps counting and a final fastest complete lap as the tie breaker. Top three places are recognized in run and ruck divisions for each distance and gender, and a "Relentless Award" is given for grit.
Relentless Basecamp at the start and finish serves as the aid station location and a personal setup area for athletes and a viewing area for spectators. Registrations received by September 24 guarantee a NOBULL X Relentless t-shirt. Visit the organization's website for the most recent information.
