Tamesis Regatta

The Tamesis Regatta is a series of rowing races in the University of Oxford, England, held annually in late November, during the seventh week of Michaelmas term. Novice crews representing each college compete against each other, often for the first time. There are separate men's and women's races, with many colleges entering more than one crew.

First run in 1959, the event used to be known as the Christ Church Regatta, as it was organised by that college boat club, but the regatta is now organised by whichever Oxford College club wins a competitive bidding process run by OURCs. Since 2022, the regatta has been organised and run by Linacre Boat Club.

The name Tamesis comes from the Latin name of the river Thames, itself from the old Brittonic Tamesas (modern Welsh Tafwys), on which the regatta takes place. It likely means 'dark'.

The equivalent race in Cambridge is the Clare Novice Regatta.