Trail Grand Velay is a late-winter trail running event held in Polignac, located in the Haute-Loire department of Auvergne-Rhône-Alpes, France. Participants can select routes ranging from 10 km to 31 km, accommodating both short-course trail runners and those seeking a longer mountain-style challenge. The 10 km route, named La Vellave Express, has the organizers as swift and demanding, while Les Seigneurs is a 21 km UTMB Index race featuring approximately 800 meters of elevation gain.
The routes traverse the natural landscape surrounding Polignac, incorporating sufficient elevation to elevate the middle-distance races beyond mere countryside jogs. Late-winter weather is a factor, with event materials noting the possibility of snow. The event attracts a notable number of participants; Les Seigneurs typically sees a few hundred finishers. The UTMB Index qualification provides competitive trail runners with an incentive to compete, complementing the local draw. The race embraces its TGV initials with the slogan "as big and as fast as a TGV!"