Henley Royal Regatta is a rowing event held annually on the River Thames by the town of Henley-on-Thames, England. It was established on 26 March 1839. As the regatta pre-dates any national or international rowing organisation, it has its own rules and organisation, although it is recognised by both British Rowing and FISA. The regatta lasts for 5 days (Wednesday to Sunday) over the first weekend in July. Races are head-to-head knock out competitions, raced over a course of 1 mile, 550 yards (2,112 m). The regatta regularly attracts international crews to race. The most prestigious event at the regatta is the Grand Challenge Cup for Men’s Eights, which has been awarded since the regatta was first staged. In 2015 Nereus won the Temple Challenge Cup which is the event for University eights. In 2016 Nereus will be challenging for the Ladies’ Plate and the Visitors Challenge Cup.