In the early years of the network through 1958, the broadcast typically came on-air fifteen minutes prior to the start of the race. From 1959 to 1971, the pre-race coverage was expanded to thirty minutes, and would include some of the official pre-race ceremonies. From 1972 to 1982 the pre-race coverage was scheduled for 45 minutes, coming on-air at 10:15 a.m. local time. Beginning in 1983, the pre-race was expanded to one hour. In 2016, a special two-hour pre-race was aired, celebrating the 100th running.