Thirty one lengths.
The Belmont Stakes. Secretariat won in 2:24 flat, still the fastest time for the race. He won by 31 lengths.
The largest margin of victory recorded in a horse race was by Secretariat in the Belmont Stakes in 1973, where he won by 31 lengths.
The fastest time was Secretariat's 31 length win in 1973 of 2:24.
Secretariat won the 1973 Belmont Stakes in world record time of 2:24 flat, by 31 lengths. The race is one and one half miles.
35
Secretariat's winning time was 2:24 flat, a figure that most experts agree may never even be approached. The margin of victory was 31 lengths.
The record time for the Belmont Stakes was set by Secretariat in 1973 in a time of 2 minutes and 24 seconds.
Secretariat holds the track record for the fastest time in the Belmont Stakes, which he set in 1973 with a time of 2 minutes and 24 seconds for the 1.5 mile distance.
A 'length' in horseracing is appoximately 8', the distance from the horse's nose to his tail. Secretariat's Belmont Stakes win put him at 31 lengths or 248 ft. in front of the 2nd place horse, Sham. He was clocked at the wire travelling 52 fps, or 52 feet per second. To this day Secretariat's record at the Belmont Stakes has never even been approached and is considered the greatest racehorse of all time.
Kentucky Derby. Belmont Stakes.Preakness Stakes. Marlboro Cup.
This and all the rest of the stats can be found at www.kentuckyderby.com