The Brotherhood of Centurions is a club for which racewalkers are eligible who have completed a distance of 100 international miles (160.9 km) in Britain within 24 hours.
Its name derives from a popular title from those competitors achieving the feat in the 19th century British long-distance walking sport, called Pedestrianism.
Among the most famous professional pedestrians of that time was Robert Barclay Allardice, who completed one mile (1.6 km) in each of 1000 sequential hours.
Centurion qualifying races are held annually in the United Kingdom, including the Isle of Man.
Some Centurions known primarily for their achievements in other distances are Brian Adams, William Brown, John Kelly, Daniel and Dominic King, Yiannis Kouros, Shaul Ladany, Paul Nihill, Frank O'Reilly, Ian Richards, Don Thompson, and Rex Whitlock.