Horses in a line. 
Taken at a race. 
The horses have just started racing.
The horses are running.
The horse is light brown.
A bunch of horses in a race
horses and jockeys in a race
jockeys riding brown horses and black horses
Keeneland horse racing track
jockeys riding horses at the race track
twelve horses on the race track
horses racing at the Keeneland racetrack 
a brown horse racing beside a black horse
a horse race at Keeneland
a brown running horse
a group of horse racers
a group of horses running
jockeys racing their horses on a track at a horse racing event