La Diagonale des Yvelines guides trail runners through the Yvelines department from south to north, with all routes concluding in Mantes-la-Jolie. The series features five events: a 90 km Ultra Trail covering 1,220 m of elevation gain, a 48 km trail with 780 m of climbing, and a 20 km trail with 340 m of climbing.
The three point-to-point races commence in distinct locations: Rochefort-en-Yvelines for the ultra, Saint-Léger-en-Yvelines for the long trail, and Septeuil for the short trail. The ultra holds an ITRA 3 rating, the long trail an ITRA 2 rating. The categories indicate a focus on adult trail runners, though the short race is also accessible to juniors.