The 30th Boat Race took place on the 29 March 1873. The Boat Race is an annual side-by-side rowing race between crews from the Universities of Oxford and Cambridge along the River Thames. In a race umpired by former Oxford rower Joseph William Chitty, Cambridge won by three lengths in a time of 19 minutes and 35 seconds, the fastest time in the history of the event. It was the first time that rowers raced on sliding seats.