Coldwater In Your Veins

Coldwater In Your Veins is a last-person-standing ultramarathon held in North Ogden, Utah, on May 31, 2025. Participants race a 7.7-mile loop with 1,200 feet of elevation change, starting every two hours. Runners must complete the loop within the time limit to stay in the race; failure to do so results in disqualification.

The event continues until only one runner remains, making it a test of endurance and strategy. The race features amenities such as a pavilion, bathrooms, and camping options, with provisions for crew support. It offers a unique and challenging ultrarunning experience for endurance athletes. Visit the organization's website for the most recent information.