Alright, I added a calendar to the OP. The endurance races are timed events, the rest are based on Kilometers driven. Most races are about 100 Km, which would equal about 40 or so minutes. The endurance races are timed to an hour, with the Le Sarthe being 2 Hours. You may also notice that we have 24 Minutes of Le Mans, this is just for practicing, 24 minutes timed, then everyone goes home.