National Hunt Flat races, informally known as bumper races, are a type of Flat racing but run under National Hunt racing rules in Britain and Ireland. National Hunt flat races were created on 15 July 1891 when a conference between the stewards of the British and Irish National Hunt Committees decided to abolish the distinction between the hunter and handicap horses and created a new amalgamated rule: National Hunt racing, 1891, amalgamated Rules 180 and 181 Bumpers are most commonly run over distances of 13–20 furlongs.