A horse has four legs. These four legs are used to run, walk, etc. around the pasture or the wild lands they roam. Depending on the breed, the speed these legs can run varies. Like most animals that have four legs, the horse’s legs are divided by front and back. There are two legs in front, and two legs in back. This allows the horse to gather speed and use their legs effectively.
With these legs, a horse is able to run races (as humans have trained them to) or find new pastures to graze in the wild. With four legs, there isn’t much they can’t do, running and walking wise. Horses can jump as well. Not as high as other species, but they are able to jump over fences. So watch out.