Is a stegasaur the fastest runner?

On the contrary, Stegosaurus was probably one of the slowest dinosaurs. Because Stegosaurus had much longer hind limbs than forelimbs, it couldn't have traveled very fast on all four legs. At 5.5 tons, it was also too heavy to run or walk on hind legs like hadrosaurs could. Thus, the top speed of an adult Stegosaurus was probably about 4 to 5 miles per hour.