Road running is the sport of running on a measured course over an established road (as opposed to track and cross country running). These events would be classified as long distance according to athletics terminology, with distances typically ranging from 5 kilometers to 42.2 kilometers in the marathon. They may involve large numbers of runners or wheelchair entrants. Road running is part of a group of road events known as "road races". Road running is one aspect in the overall sport of athletics.

Road running may offer those involved a range of challenges and interests such as dealing with hills, sharp bends, varied surfaces, inclement weather, and involvement in a large group. Aerobic fitness, or the ability of the body to use oxygen, is the biggest factor contributing to success.^{[citation needed]}

The impact of running on roads puts more stress on the feet, knees and lower back than running on dirt or grass. It can compensate by providing a consistent, level surface. It may put less strain on the Achilles tendon.