The "Thriller "is fast becoming one of the best events on the mountain bikers calendar and is the largest mountain bike event of its kind in the world with over 4,000 riders. Its wide appeal lies in the fact that it caters to all mountain bikers, from recreational day riders to night riding adrenaline junkies. The ride is a five-person lap race, or continuous relay event, operating for twelve hours from 10.30am to 10.30pm. Only one team member may be riding on the course at any one time and the next rider must be tagged to commence their lap. The course is 8km or 30 minutes in length.