The Chiliad Challenge is a side mission in Grand Theft Auto: San Andreas. The mission is started by entering a parked Mountain Bike on top of Mount Chiliad between 7:00 and 18:00 and having a cycling skill above 40%. The goal of the mission is to be the first to reach the base of the mountain while racing with other mountain bikers down the mountain. There are three courses that need to be completed for 100% completion. All three courses share the same finish zone and the final sector.