Downhill (DH) mountain bike racing is a format of racing that pushes rider skill and fitness to the limits. It takes place on fast, steep, technical, rough tracks. Riders take it in turns to see who can get from start to finish the fastest. Riders will normally get to walk the track prior to the race, then have a limited opportunity for practice runs before seeding and racing. Seeding is a single run that determines the race run order. The benefit of being first in seeding is that you get to race last, and therefore often know what time you need to beat in your race run.