Mammoth Endurance 36 Hour Tri Relay
Always double-check with the organizer's website! This page may contain affiliate links.
Mammoth Endurance 24|36 Hour Tri Relay : April 30 - May 2, 2026
The event takes place at Oak Mountain State Park in Pelham, Alabama. It is organized as an ultra triathlon relay with two timed formats:
- 24-hour Tri Relay
- 36-hour Tri Relay
Registration closes on Mon, Apr 27 at 11:59 PM ET.
Race structure and rules
Teams of three compete on an open-course triathlon. The swim is restricted to daytime hours. Teams accumulate points by completing swim, bike, and run activities over the chosen 24-hour or 36-hour period. There are no restrictions on how much of each discipline a team completes, or on the order in which disciplines are done. The format includes overnight hours and requires teams to manage racing through night and day. Visit the organization's website for the most recent information.