Land of Entrapment Back Yard Ultra

Land of Entrapment Backyard Ultra : San Ysidro, New Mexico

The Land of Entrapment Backyard Ultra is a backyard ultra event held in San Ysidro, New Mexico. The race uses a repeating loop format in which each participant must complete a 4.167 mile loop every hour. The loop cycle repeats hour after hour; competitors continue until only one runner remains, a format often described as "Last One Standing."

The event is organized by RaceNM, a New Mexico grassroots running organization. Past editions of the event are listed, including a 2024 running.

The format places emphasis on consistent pacing, routine between loops, and endurance over extended time rather than a fixed distance goal. The course runs on local terrain in the San Ysidro area and requires each loop to be completed within the allotted hourly interval for a competitor to remain in the event.

Logistics such as registration and past event details are maintained by the organizer. The description above reflects the event format and location without specifying scheduled start or finish times. Visit the organization's website for the most recent information.