From London via M4M4 west and come off at Junction 8/9 and follow signs to Henley
Over only bridge in Henley
After 150 yards turn right at lights
Continue on A4130 towards Wallingford [and Oxford]
1 mile out of Henley take right to Stonor (another 3 miles)
The ground is on the left as you exit Stonor
The entrance to the ground is hidden. Your best 2 options are (1) to turn left into the dirt road that leads to the pitch as you see the railings on the right or (2) miss the entrance and find yourself outside the impressive gates of Stonor Park. Look to the left and you will see the ground. Do a U turn and take first right (seemingly into a field).
Allow an hour from Hammersmith Broadway.
From London via M40
(best route when Henley Regatta is on, and whenever Remenham Hill is likely to be busy)M40 west and come off at Junction 5 [Stokenchurch]
Up slip road and immediately right over the M40 and then first left after 100 yards or so on to the A40 [to Aston Rowant, Kingston Blount]
After a minute turn left towards Christmas Common
After 3 miles go straight through Christmas Common and then Greenfield. After another mile turn sharp left to Pishill and Stonor. Stay on the road all the way to Stonor and the pitch, a mile or so after Pishill. Cricket ground is 150 yards first right after a turning [on the left] to Turville Heath. The pitch is some 50 yards past the great gates of Stonor Park [also on left]. Can’t miss it [actually you can].
Allow an hour from Hangar Lane.
On Google map below STONOR PARK CRICKET GROUND is on the left, just before the turning (Balham's Lane) to the right.