Duathlon Ernée Triathlon is a run-bike-run event in Juvigné, a commune in Mayenne, France’s Pays de la Loire region, typically held in early March. Organized by Ernéenne Sports Triathlon, it features XS and S formats. The S race consists of a 5 km road run, a 20 km road bike leg, and a final 2.5 km road run. The program also includes D3 men's and women's races with an open category, indicating it is more than a casual local event.
The race has historically featured close duathlon contests rather than straightforward time trials. In one notable edition, Ernée Tri’s Adrien Leroux defeated Arnold Jeannesson of Hels Rider Cycling by five seconds to win the Mayenne championship, after Jeannesson was unable to separate from him on the bike. Leroux mentioned he almost faltered during the cycling leg but persevered, feeling stronger on foot, and subsequently won on home ground before friends shortly after securing a regional title. Paul Cauvin of Sco Angers placed behind the leading pair. The closest train station for visitors is Saint-Pierre-la-Cour, approximately 13 km from Juvigné.