A marathon race is a long-distance running event that covers a distance of 26.2 miles (42.195 kilometers). It is typically held on roads and can attract both professional athletes and amateur runners. Marathons are often organized as part of larger events, such as city festivals, and can take place in various locations around the world. Participants in a marathon train extensively to build endurance and stamina. Many marathons also include shorter races, such as half-marathons (13.1 miles), to encourage wider participation. Notable marathons include the Boston Marathon, the New York City Marathon, and the London Marathon.