"100 Miles" typically refers to a distance of one hundred miles, which is equivalent to approximately 161 kilometers. This distance is often used in various contexts, such as running events, cycling races, or long-distance hiking trails. It can also represent a significant challenge for endurance athletes and outdoor enthusiasts. In the context of running, a "100-mile race" is a popular ultra-marathon event that tests participants' physical and mental stamina. These races often take place on trails and can include varying terrains, making them both challenging and rewarding for those who complete them. Participants often train extensively to prepare for such an event.