How fast do race horses run?

A race horse can go up to about 40 mph. Quarter horses can go faster, but only for a quarter of a mile ( that's why they're called quarter horses, believe me, when they spook, they're stinking FAST)

Actually, the fastest recorded horse is somewhere between 55-60 mph but it is true that on race tracks they are averaging out about 40 mph. That is really fast if you ask me. I think that horses are a wonderful pets and some times you can ride them