The Boat Race public tests are in November at the British Indoor Rowing Championships, where each university sends around 20 rowers to compete. Everyone races 2 km on an indoor rower with the club presidents using adjacent machines. Both universities also send crews to the Head of the River Fours race in London, which is raced over the reverse Boat Race course, that is to say the Championship course from Mortlake to Putney. In December, the coaches put out "Trial Eights" where two crews from the same university race each other over the full Boat Race course. These crews are given names such
Head of the River Race Head of the River Race The Head of the River Race (HORR) is an against-the-clock ('processional') rowing race held annually on the River Thames in London, England between eights, other such races being the Schools' Head of the River Race, Women's Head of the River Race and Veterans' Head of the River Race. Its competitors are, with a few experienced junior exceptions, seniors of UK or overseas competitors and it runs with the ebb tide down the 4.25 mile (6.8 km) Championship Course from Mortlake to Putney which hosts the Oxford and Cambridge head-to-head races usually between one and two