The fastest mammal is the CHEETAH, which is a large cat native to Africa and the Middle East. It is the fastest land animal, capable of reaching speeds of up to 75 mph in short bursts. Cheetahs have long legs and a slim body, which helps them to reach such high speeds. They also have semi-retractable claws that help them grip the ground when running. Cheetahs are known for their distinctive spotted coats, which help them blend into their environment.