InHouse Ultra

JUN
27-28
2026
An indoor, last-one-standing treadmill endurance event limited to 33 athletes; competitors run 5 miles each hour until only one remains, with a recovery zone, temperature control, rotating music, and limited spectator space.
27-28 Jun 2026
5 Miles Every Hour

Always double-check with the organizer's website! This page may contain affiliate links.

InHouse Ultra

InHouse Ultra is an indoor, last-one-standing endurance event held at Run Unlimited and Twenty One Run. The field is limited to 33 athletes nationwide. The format requires athletes to run 5 miles every hour, on the hour and to complete each 5-mile segment before the next round begins. Missing a round results in a DNF. Competitors may not stack miles or stand on the sides of a moving treadmill. The last athlete remaining wins.

Athletes must be self-supported for fuel and gear. One crew member is allowed but may not provide assistance during treadmill sessions. A recovery zone is available between rounds. The room is temperature controlled to 72 degrees and movies and music will rotate during the event. Participants are asked to bring their own chair and cooler for specific nutrition needs. Family and friends are welcome to attend and cheer, with the note that studio space is limited. Visit the organization's website for the most recent information.

5 mi
5 Miles Every Hour
Add Event
Help us complete the calendar!
  • Distance is at least 5 km
  • Event has a website or Facebook page
Website
Optional: Please provide your e-mail address if we may contact you.
Report a change
We will only update the data if the information is also on the website.