No. The horse can be any color as long as they train and are ready.
I believe there are more brown horses than black horses thet enter a derby.
Twenty horses can race at a time
The Kentucky Derby
Horses can only enter the derby when they are at a certain age, which means that can't enter the derby more than once. So the answer is pretty much none. But they can enter the Preakness and Belmont Stakes after the Derby in the same year.
the most wins for anyone-trainer, jockey, or owner is Calumet Farms has won with 8 of there horses (horses can only race once as a 3 yro)
All were colts in the 2011 Kentucky Derby. With the exception of one gelding, Comma To The Top
Bay (brown body with black mane and tail) is the most common color in horses.
In the Epsom Derby, horses typically compete at the age of three. This is a classic horse race held annually in Epsom, England, and is one of the most prestigious events in horse racing. The age requirement helps to showcase the potential of younger thoroughbreds as they begin their racing careers.
Big like how? It's 20 horses, 1 1/4 miles long, and Americas most popular race
Assuming you are speaking of the Kentucky Derby: This Grade I Stakes race is for 3-year-old Thoroughbreds of either sex. A Thoroughbred technically turns its next age on January 1 of any given year. Because horses generally are born between January and June, a horse entering the Kentucky Derby, which is held in May, usually will be 3-years-old both technically (because of the January 1 date) and actually (because most are born before the early May date of the Derby) -- but there may be as much as a 4- or 5-month difference in the actual ages of the horses in the Derby.
black or a dark brown
I have seen horses race as yearlings and to be in the Kentucky Derby they must be three. It just depends on the race! Most thoroughbreds begin racing at age 2.
Kentucky has the most horses per capita in the United States. Its horse industry is a significant part of the state's economy and culture, with popular events like the Kentucky Derby drawing visitors from around the world.