There are many different events and types of running:
- Sprints: races where the participants are expected to run as fast as they can for the entire distance of the race. They are the shortest races, due to endurance concerns. The most common sprint distances are 60m, 100m, 200m, and 400m.
- Middle distance: races that are longer than sprints; the most common tracks are 800m, 1500m, or 3000m. However, they can range anywhere up to 5000m.
- Long distance: these races are far longer than sprints or middle distance races and require an incredible amount of endurance. The races run between 5,000m and 10,000m.
- Marathon: a specific long-distance running event of 42.2km. This sort of race requires extensive training, with up to 40 miles per week run by the trainee to prepare for the event. Most people train for six months, but some go as far as a year out to get in shape for a marathon.
- Ultrarunning: takes marathon running to the next level, with races usually spanning a distance of 50Km, 50 miles or 100 miles. There are two types of races in this class: events with a distance set and races with a time limit set. There are even more forms of ultrarunning events; 24-hour races, double marathons, and races that go as high as 1,000 miles, and run for multiple days.