Leave the M25 at Junction 11 and follow the signs to Woking (A320). Pass through 4 roundabouts, and at the 5th one take the 2nd exit (signposted M3). Turn right onto the A324 (signposted M3 / Aldershot).
At the first roundabout take the 2nd exit, carrying on the A324, then at the following roundabout take the 1st exit. At the next roundabout, take the 2nd exit.
At the next roundabout take the 2nd exit onto Redding Way, and Brookwood County Park is the first turning on your left.