From Route 22
Westbound:
Follow Route 22 West into Bridgewater and make a right onto Country Club Road. (It is the second light after passing the exit for Routes 202/206.) Follow to the first light, and make a right onto Garretson Road. The entrance to Green Knoll will be approximately half mile down the road on the left.

Eastbound:
Follow Route 22 East through Branchburg. Make a right turn at the exit marked for Route 28. (It is the exit after Milltown Road.) At the base of the exit ramp, turn left onto Route 28 West, and immediately after passing under Route 22, make the first right at the median strip, and then bear left onto Garretson Road. The entrance to Green Knoll will be approximately half mile down the road on the left.

From 206
Northbound:
Follow Route 206 until the Somerville Circle. Exit off of the circle onto Route 28 West. Approximately two miles down Route 28, you will intersect Route 22. Stay on Route 28. The exit for Garretson Road is located at this same junction. Make a right onto Garretson Road, and the entrance to Green Knoll will be 1.5 miles down the road on the left.

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From Route 78
Westbound:
Follow Route 78 West to Route 287 South. Then follow the above directions for Route 287 South.

Eastbound:
Follow Route 78 to Route 287 South. Then follow the above directions for Route 287 South.