Long-distance races are athletic events that cover significant distances, typically ranging from 5 kilometers to ultra-marathons exceeding 100 kilometers. These races test endurance and stamina, requiring participants to train extensively. Common long-distance races include the marathon, which is 42.195 kilometers, and the half-marathon, measuring 21.097 kilometers. Participants in long-distance races often follow specific training regimens to build their physical and mental strength. Races can take place on various terrains, including roads, trails, and tracks. Events are organized worldwide, attracting both amateur and professional runners who compete for personal bests or to achieve qualifying times for prestigious events like the Boston Marathon.