The hour record is the record for the longest distance cycled in one hour on a bicycle from a stationary start. Cyclists attempt this record alone on the track without other competitors present. It is considered perhaps the most prestigious record in all of cycling. Over history, various cyclists ranging from unknown amateurs to well-known professionals have held the record, adding to its prestige and allure. There are several records, the most famous of which is for upright bicycles meeting the requirements of the Union Cycliste Internationale (UCI). Hour-record attempts for UCI bikes are made in a velodrome.