How many horses run in each of the Triple Crown races?

Question

Also, how many horses have won the Kentucky Derby after being last out of the starting gates?

Answer 1

It depends on how many are entered in the race but there is a maximum or approximately 20 for the Derby I believe.

I'm not sure of the exact number but it is actually far too many horses.

Most everyday races at mile racetracks have no more than 12 horses in the longer races.