The Lent Bumps (also Lent Races, Lents) are a set of rowing races held annually on the River Cam in Cambridge. They began in 1887, after separating from the May Bumps, which are bumping races held in mid-June. Prior to the separation there had been a single set of annual bumps dating from its inception in 1827. The races are open to all college boat clubs from the University of Cambridge, the University Medical and Veterinary Schools and Anglia Ruskin Boat Club. The Lent Bumps take place over five days (Tuesday to Saturday) at the end of February / start of March and are run as bumps races.