Fifteen miles is a unit of distance commonly used in the United States and other countries that use the imperial system. It is equivalent to approximately 24.14 kilometers. This distance can be covered by various modes of transportation, including walking, biking, or driving. In terms of time, walking fifteen miles might take around five to six hours, while driving could take about 15 to 20 minutes, depending on traffic conditions. For reference, a typical marathon is 26.2 miles, making fifteen miles a significant distance for runners and athletes training for long-distance events.