Mammoth Endurance 36 Hour Tri Relay
APR-MAY
30-2
2026
Tri Relay 24 Hours
Tri Relay 36 Hours
Always double-check with the organizer's website! This page may contain affiliate links.
Mammoth Endurance Ultra Triathlon Relay : April 30 to May 2, 2026
The event takes place at Oak Mountain State Park in Pelham, Alabama. It offers two relay options: 24-hour and 36-hour triathlon relays. Registration closes Mon, Apr 27.
Race format and rules
Teams of three compete on an open-course triathlon with the swim restricted to daytime hours. Teams accumulate points over the selected 24-hour or 36-hour period. There are no restrictions on how much of each discipline a team completes or the order in which team members perform events. The format includes overnight activity and the associated challenges of sleeplessness. Visit the organization's website for the most recent information.
36 hr
Tri Relay 36 Hours
24 hr
Tri Relay 24 Hours