oh yes i race cyclo x here in england it is great,its usually a hour race,in the rain and mud,you sprint at the start and your heart rate stays at max till the finish,it really is good fun,i do it most sundays through the winter,im not that great at it ,last week i came 43rd out of 70,my bike broke on the last lap so i had to run to the finish carrying the bike,but its all fixed and ready for this week