The 1999/2000 season of the Freestyle Skiing World Cup organized by the FIS began on September 11, 1999 in Mount Buller ( Australia ) and ended on March 17, 2000 in Livigno ( Italy ). Competitions were held in the disciplines aerials (jumping), moguls (mogul slope), dual moguls (parallel mogul slope) and, most recently, ski ballet , although there was no discipline rating for the latter.