The Schools' Head of the River Race (SHORR) is the UK's largest school-age processional (head rowing) race and is organised by Westminster School for crews aged between 14 and 18 years old. It is held in Spring, the end of the head race season. The race forms a leg of the national kudos of winning a rowing 'triple' in which occasionally an undefeated Junior Eight (J18 8+ or WJ18 8+) wins this race, the National Schools Regatta, and either the Princess Elizabeth Challenge Cup at Henley Royal Regatta or the Peabody Cup at Henley Women's Regatta.