1 Leave the car park for the road and keep left. Pass a track on the left and cross a cattle grid. Continue through woodland to a gate and footpath sign on the left. Skirt the field, keeping trees on the left, to a gate. Veer half left in the next field, keeping to the left of Ward's Hurst Farm. Cross a stile, look for a waymark by the outbuildings, bear left and keep the fence on your right. Pass under power lines to a stile and take the Icknield Way through the Ashridge Estate.
2 Follow the waymarked trail through woodland to a kissing gate and continue ahead, avoiding the Boundary Trail branching off to the right. Cross a stile and keep the fence on the left, climbing gently via two stiles to a marker stone for the Icknield Way, the Peddars Way and the Ridgeway. Turn right to a gate and stile and follow a clear track striking out across expansive downland. Head up the steep slope to the ridge and bear left to a stile. This stretch of the walk offers grand views of Ivinghoe Beacon and the surrounding countryside. Walk ahead at the Ridgeway sign, making for the start of the National Trail.
3 With your back to the Ridgeway plinth, follow the trail as it runs south. Descend steeply, keep left at the fork and make for the road. Cross over and continue on the National Trail, beginning a moderate climb. Cut between trees before spotting a deep combe cutting in to the hillside on the right. Pass a gate and stile and when the Ridgeway sweeps right by a waymark, bear left and head up the steep slope to a stile. Cross a track just beyond it and follow the woodland footpath until you reach the drive to Clipper Down Cottage. Join the road here, turn left and return to the car park.