The race track can be a any size, but a hose race will usually be 1 mile, 1 1/4 mile, 1 1/2 mile. Quarter horse races are the shortest: 1/4 mile.
A length, at Churchill Downs or anywhere, is approximately eight feet.
chanclorville thing
a Furlong is 1/8 of a mile a furlong is 220 yards or 660 feet.
A normal racing track is a mile.