Running distances refer to the various lengths that runners can cover during their workouts or races. Common distances include the 5K (3.1 miles), 10K (6.2 miles), half marathon (13.1 miles), and full marathon (26.2 miles). Each distance presents unique challenges and requires different training strategies. Runners often choose distances based on their fitness levels and goals. Shorter distances, like the 5K, are popular for beginners, while longer distances, such as the marathon, attract more experienced runners. Training for these distances typically involves a mix of speed work, endurance runs, and rest days to build stamina and prevent injury.