Watford Locks (grid reference SP592688) is a group of seven locks on the Leicester Line of the Grand Union Canal, in Northamptonshire, England, famous for the Watford Gap service area. The locks are formed (looking from the south), of two single locks, a staircase of four, and a final single lock. Together they lift the canal 16 m (52 ft 6 in) to the "Leicester Summit", which it maintains all the way to Foxton Locks.