What is the fastest land mammal?

The fastest land mammal is the cheetah, Acinonyx jubatus. Its body is specialized for short, explosive chases, allowing it to accelerate faster than almost any other land animal.

Cheetahs have long legs, a flexible spine, enlarged nasal passages, powerful hindlimb muscles, and a long tail that helps them balance during sharp turns. Their claws are only partly retractile, giving them extra traction while sprinting. These adaptations make the cheetah an exceptional sprinter rather than a long-distance runner.

Reliable measurements place a cheetah’s top speed at roughly 100 kilometers per hour, with the highest rigorously measured figures reaching about 104 km/h. A sprint usually lasts only seconds because intense anaerobic effort quickly produces heat and fatigue. During a hunt, the cheetah must close the distance rapidly before its prey can escape.

The pronghorn is often mentioned as a rival because it can maintain high speed for much longer. It has greater endurance, but the cheetah remains the fastest land mammal in peak sprinting speed. Claims of 120 km/h or more are generally considered exaggerated.