NYC 50k - Stair Set of Doom Ultra

The NYC 50k - Stair Set of Doom Ultra, taking place on April 18, 2026, offers an unparalleled adventure through the dynamic heart of New York, NY. This 33.3-mile (50k) ultra-marathon is far from an ordinary race, challenging runners with over 3,500 feet of elevation gain and an impressive 90 stair sets, ranging from massive climbs to subtle ascents. The course is a raw, unfiltered journey across four diverse boroughs, winding through city streets, verdant parks, and even some dirt trails. Participants will traverse 16 unique parks and cross 6 iconic bridges, experiencing hidden gems and famous landmarks of the city from a truly unique vantage point. Starting in the Bronx at the Riverdale Metro North Parking Lot and concluding in the Financial District with celebratory post-race beers, this event promises an epic day of exploration and grit.

Runners consistently praise the NYC Stair Set of Doom Ultra for its challenging nature and its ability to showcase parts of New York City rarely seen in other races. While largely self-supported, limited aid stations will be available along the route, with specific public restroom locations marked for convenience. Typical race day conditions in mid-April feature comfortable highs around 63F and lows of 47F, with only a 14% chance of precipitation, offering favorable weather for tackling this urban beast. This race is a testament to endurance, inviting you to become part of the city's legend, one stair-climbing step at a time.