Rando Trail Trept is a small trail running event in Trept, a village in Isere, Auvergne-Rhone-Alpes, France, typically scheduled for mid-April. It offers discovery-style trail races, not road races, with options around 10 or 11 km and longer ones near 20 or 21 km, allowing runners to select a manageable outing or a more demanding run.
The routes feature wild paths, ascents, rapid pace shifts, and engaging single-track sections across the Isere countryside. The event appeals to regular trail runners, outdoor challenge enthusiasts, and those seeking a friendly local race, focusing on shared enjoyment, personal effort, and environmental respect. Post-race, participants can easily extend their day with a swim at Lac de Paladru or a visit to the Chateau de Virieu.