The walk is through the Coton Countryside Reserve owned and managed by the Cambridge Preservation Trust, who also care for Wandlebury: further information on Coton from http://www.cpswandlebury.org.
[1] Continue down The Footpath from the parking spot, passing a recreation ground and pavilion on the right, and shortly turn right through a formidable gate.
There are some interesting notices on the left.
Head straight on down the farm road to reach a T junction and, if reasonably dry, go straight ahead through the kissing gate into the meadow with its ridge and furrow, through further gate, and another, to emerge on to farm road. If wet, bear left at the T junction above, to arrive at [2].
[2] Turn right and cross the Bin Brook, and then turn sharp left around field very close to M11, cross wooden bridge in far comer and go forward to reach the road. Cross the road and go through the gate on the otherside, then turn left and keep to the hedge on the left until reaching a sentry box (rifle range ahead!). Turn sharp right and go up the hill and through a gate, and bear right up hill, and left up steps to reach " the summit" (all things are comparative!)
Fantastic views are to be had here : Madingley Ridge and American Cemetery; round to St. Johns College tower; University Library; The Catholic Church; Addenbrookes; King's; the Gogs; the Anglian chalk ridge.. .it's all there.
Drop down sharply, and at the bottom of the hill turn sharp right, with hedge on left. At the road cross to the car park.
[3] Turn sharp left and walk in the field parallel to road, with hedge on left. Over a bridge and at next major hedge turn right, and then cross Clarkes Bridge, before turning left through a gate into the meadow again. Walk forward for 300m and then turn right through a gate to head to the right of a cream coloured house. Pass through the hedge into the recreation ground, and head across back towards the The Plough.