Urban Trail Houdan begins and ends at the gymnasium on rue du clos de l'ecu in Houdan, a town in Yvelines west of Paris. This April event offers several trail-running distances: 12 km, 6 km, 3 km, 1.5 km, and 1 km, accommodating both adult races and short children's runs.
The main 12 km race, Le Raid Sica, crosses streets, alleys, stairs, and trails around town, featuring approximately 180 meters of elevation gain and grassy sections prone to mud. The 6 km course remains largely within town, incorporating stairs and paths. La Familiale is a flat 3 km run through Parc du Cygne and Parc de la Vesgre. The two shortest races are flat loops within Parc de la Vesgre; the 1 km allows very young children to run alongside a parent. Each adult race is limited to 250 participants, and each shorter race to 100. The event supports a solidarity trip for middle school students.