Mature bison bulls are some of the fastest land mammals, capable of reaching speeds of up to 35 miles per hour. This impressive speed is made possible by their long and powerful legs, which helps them cover large distances with each stride. Additionally, bison have a wide chest and large lungs, which helps them to take in large amounts of oxygen to fuel their muscles. While most bulls only reach speeds of up to 25 miles per hour, the longest and fastest recorded sprint was an impressive 35 miles per hour. This exceptional speed allows bison to easily outrun predators and escape danger. In fact, their speed is so great that it has even been known to injure humans who are foolish enough to try and outrun them.