The locks are numbered from 7 at the top of the flight to 13 at the bottom. To the south of the flight is a long level pound, which stretches to the Stoke Bruerne Canal Museum and the top of the Stoke Bruerne flight of seven locks. Towards the southern end of this section is Blisworth Tunnel and Gayton Junction, where the Northampton Branch turns off to join the River Nene at Northampton. Just below the junction, the railway line from London to Rugby crosses the canal and then runs parallel to it. About below Whilton Locks, the M1 motorway approaches, and runs along the east bank, so that the bottom four locks are sandwiched between the railway and the motorway. The railway then crosses to the east bank, and the canal diverges to the west. Just before the final lock, the canal passes under Watling Street, once a Roman road and now part of the A5 road. The Leicester section of the Grand Union Canal then turns off at Norton Junction, and the canal continues on the level, passing through Braunston Tunnel to reach the top lock of the six that descend to Braunston, from the top of the Whilton flight.
