Death by 5k Waterloo

Prepare for an extraordinary test of endurance at the Death by 5k Waterloo, a unique 50K challenge set against the scenic backdrop of George Wyth State Park in Waterloo, IA. Taking place on May 16-17, 2026, this event redefines the ultra-running experience, requiring participants to conquer ten individual 5K segments over a grueling 24-hour period. Each 5K begins precisely 2.5 hours after the last, pushing runners not only physically but also mentally as they battle fatigue and sleep deprivation. This challenging format has gained a reputation for being one of the hardest ways to complete a 50K, testing limits beyond just mileage.

The course itself features an out-and-back route on the paved Cedar Valley Lakes Trail, offering a generally flat profile with minimal elevation changes. Runners can enjoy wooded scenery, with past participants noting sightings of local wildlife like turkey and deer. The race headquarters at the Canfield Shelter serves as a central hub, providing crucial support throughout the 24 hours. Participants are well-cared for with five hot meals, alongside an abundance of snacks and drinks to keep energy levels high. Between segments, runners can find respite and attempt to recharge in their own camping tents, hammocks, pop-up tents, or vehicles. Typical race day conditions in mid-May bring comfortable highs around 73°F and lows around 50°F, with an 18% chance of precipitation.

What truly sets Death by 5k Waterloo apart is its distinctive blend of camaraderie and competitive spirit, culminating in a highly coveted and unique finisher's award: a handmade coffin. This event, now in its fourth year in Waterloo, promises an unforgettable journey for the limited field of 150 participants. Whether you're seeking to push your boundaries or simply experience an ultra-marathon in a truly unconventional way, the Death by 5k Waterloo offers an unparalleled challenge that celebrates mental fortitude as much as physical prowess.