Trail de l'Authre Tour is a trail running event in Naucelles, a commune in France's Cantal department in the Auvergne-Rhône-Alpes region. The listed race format includes a 15 km nature race, with a morning start.
The available details are sparse, but the name points to the Authre area around Naucelles rather than an urban road race. Runners should expect a local French trail event built around countryside paths and natural terrain, with the 15 km distance as the concrete option in the published information.