You will not see a Paint horse in the Kentucky Derby. The Derby is for Thoroughbreds only. A Paint is a spotted horse with Quarter Horse and Thoroughbred bloodlines.
The first year that a woman entered a horse in the Kentucky Derby was 1904. Her name was Laska Durnell. Her horse, Elwood, won the Derby that year.
The Kentucky Derby
The Kentucky Derby did not begin until 1875.
Giacomo won the Kentucky Derby in 2005.
The Kentucky Derby is a Thoroughbred horse racing event.
The Kentucky Derby is a race for Thoroughbreds.
The first gray horse to win the Kentucky Derby was Determine in 1954.
Horse 'Secretariat' won the Derby in 1973.
If you are talking about the Kentucky Derby, the horse was Jet Pilot.
By 'Kentucky Horse Race' I'll assume you mean Kentucky Derby as there are hundreds of races in Kentucky. The Derby is a mile and one fourth in length.
The Kentucky Derby is a horse race, you would win it on a horse, specifically a three year old Thoroughbred.