The Triathlon de Fresnes is a short XS triathlon held in Fresnes, organized by the local Triathlon de Fresnes club for solo participants and relay teams. It is open to juniors in the individual race and to cadet-category athletes in relays, meaning the field can include younger competitors alongside adults. The format follows the standard triathlon sequence: swim, bike, then run.
The club organizing the event is described as a group of friends who have been involved with triathlon since 1987. Their Fresnes triathlon school helps introduce new participants to swimming, cycling, and running. This event marks its 30th edition, with organizers publicly acknowledging volunteers and partners. A more recent addition, the Cyclathlon, offers an alternative for athletes interested only in bike-run racing, featuring a 11.5 km bike leg followed by a 3.5 km run. On race day, participants adhere to referees' decisions and marshals' instructions, reflecting the club's ethos: a friendly, local event that is nonetheless properly managed.