Winter Challenge 4H / R1

Winter Challenge 2026-2027 opens on November 7 2026 at Ouest Karting in Aunay-les-Bois, Normandy, France, with round 1 of the track's 10-round rental karting endurance championship, combining a sprint race with a 4-hour endurance race. The sprint race has qualifying and three 10-minute sprints, and its results score points for each driver's team. The 4-hour race follows with 15 minutes of qualifying. Teams race with Sodi SR5 390cc karts, equalised weight 85kg and quick driver and kart changes, in Legend and Amateur classes with a maximum of 30 teams per race.