From the north, leave or cross the M4 at Junction 15, and continue on the A346 toward Marlborough. On passing Marlborough Golf Club, take your next right hand turn at the top of the hill into Marlborough, and the first right into Free's Avenue. Continue 2 miles. Barbury Estate and Racecourse is on your right. Do not follow brown signs to Barbury Castle.
From the south, leave Marlborough on the A346, and turn left off the A346 at the top of the hill exiting Marlborough, then right into Free's Avenue. Follow the orad for 2 miles. Barbury Estate and Racecourse is on your right.