Tring Reservoirs is a group of four reservoirs close to Tring on the border of Hertfordshire and Buckinghamshire, England. Their purpose is to feed the Grand Union Canal.The four reservoirs are: Startops End, Marsworth, Tringford and Wilstone. These reservoirs adjoin each other, separated only by paths and roads; the fourth, Wilstone Reservoir, is a short distance to the west, close to the village of Wilstone.