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.