Head of the River Race
The Head of the River Race (HORR) is an against-the-clock ('processional') rowing race for men's eights held annually on the River Thames in London, England; other such races are the Schools' Head of the River Race, Women's Eights 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 clubs and it runs with the ebb tide down the 4.25 mile (6.8 km) Championship Course from Mortlake to Putney which usually one or two weeks later hosts the Oxford and Cambridge head-to-head races.