Garston Lock (grid reference SU655707) is a lock on the Kennet and Avon Canal. It is near the M4 motorway and near Reading, England. Garston Lock was built between 1718 and 1723 under the supervision of the engineer John Hore of Newbury, and this stretch of the river is now administered by Canal & River Trust and known as the Kennet Navigation. It has a rise/fall of 7 ft 7ins (2.29m). The lock is a grade II* listed building. Two pillboxes dating from World War II at the northwest and southeast corners of the lock, which were built as anti tank defences, are also listed buildings. * *