Start in Earls Barton on the Northampton Road next to Aggate Way, just down the hill from West Street, 50 yards before the national speed limit sign.
Proceed south to the roundabout, take the second exit to A45 bearing left to join the A45 eastbound carriageway.
Take first slip road to junction with B573 Doddington Road (2.5 miles) and at the junction turn left. Over the A45 and then left again to rejoin the A45 westbound (heading towards Northampton).
Take 2nd slip road at the Great Billing turning right to cross over the A45 on flyover to take third exit heading north up the hill to the next roundabout (7.3 miles).
Encircle this roundabout and return to Great Billing flyover and take the left exit slip road onto the A45 travelling east.
Proceed on A45 eastbound to next slip road, bear left to roundabout, take first exit and finish just past the roundabout at the farm entrance.