River Thames the stretch of river from Chiswick to Putney. Two rowing events on the River Thames are traditionally part of the wider English sporting calendar: The University Boat Race (between Oxford and Cambridge) takes place in late March or early April, on the Championship Course from Putney to Mortlake in the west of London. Henley Royal Regatta takes place over five days at the start of July in the upstream town of Henley-on-Thames. Besides its sporting significance the regatta is an important date on the English social calendar alongside events like Royal Ascot and Wimbledon. Other significant or historic rowing events
The Boat Race 1846 was rowed on the ebb tide, from Mortlake to Putney. For the first time in the history of the race, both boats used outriggers. Cambridge "rowed in an outrigger built by Searle, 60 ft in length, 2 ft 8 in in breadth", while Oxford's boat was "expressly built for this match by King of Oxford" and 58 ft 6 in long. Both crews had professional coaches: Oxford used John Noulton while Cambridge were trained by Robert Coombes, a champion sculler. It marked the start of the debate over the use of professional coaches which was not resolved until the 1852