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A 12-hour run is a form of ultramarathon in which each competitor tries to run as far as possible in 12 hours. The event is typically held on 1 to 2 mi (1.6 to 3.2 km) loops, but sometimes is held on 400-metre (0.25 mi) tracks. [1] Some races are held on trails and others are held on sidewalks in city parks. Top runners will often run 60 miles ...
A 24-hour run is a form of ultramarathon, in which a competitor runs as far as they can in 24 hours. They are typically held on 1- to 2-mile loops or occasionally 400-meter tracks. Top runners will often run 200 kilometres (124 mi) or more, depending on conditions, and the best can go beyond 270 kilometres (168 mi).
The International Association of Ultrarunners (IAU) is the world governing body of ultra running, race events longer than the marathon distance of 42.2 km. It regulates and sanctions the World Championships for various ultramarathon distances, and tracks world records in ultra distance races approved by IAU.
Created Date: 8/30/2012 4:52:52 PM
An ultramarathon is a footrace longer than the traditional marathon distance of 42.195 kilometres (26 mi 385 yd). The sport of running ultramarathons is called ultra running or ultra distance running. Various distances, surfaces, and formats are raced competitively, from the shortest common ultramarathon of 31 miles (50 km) and up to 3100 miles ...
Lake went on to invent a new format of race in 2011, the backyard ultra. Participants run a 4.167-mile (6.706 km) loop every hour, on the hour and are eliminated if they fail to complete the loop in time. The distance of each loop is equal to 100 divided by 24, so that a competitor runs 100 miles for a full day of competition.
Very long endurance running events can be divided into three broad categories: the traditional 26.2-mile (42.2 km) marathon, the ultramarathon, defined as any event longer than the marathon, and true multiday events, which begin with the 24-hour event and can stretch out almost indefinitely, often ranging from six days to 3,100 miles (5,000 km) or longer.
The road running event was later upgraded to World Championships status after 2006. It is one of the IAU's four main world championship events (alongside the 100 km World Championships , 50 km World Championships , and Trail World Championships ) and is the only one with a limited time format, rather than a distance-based one.