Google Maps (click here)

From 128 Northbound:  ((Allow time due to Rt 20 Traffic)):
Take Exit 26 (Rt 20 West Marlboro) Through Weston Wayland and into Sudbury
Turn RIGHT (North) on Rt 126/Rt27 and stay left at when the road forks (Rt 27)
Take Rt 27 across the Sudbury River and into old Sudbury Center
Just past Sudbury Center Rt 27 veers to the RIGHT
Follow Rt 27 to Cutting Field (very visable on LEFT)

From Boston:
Take Mass pike to 128 North and follow directions above.

From 128 Southbound  to  Rt 2:
Take Rt-2 [Concord Tpke] 13.3 Miles
Bear LEFT (West) onto RT-62 [Main St]
Turn LEFT to stay on Rt-62 [Main St] 
Keep STRAIGHT onto RT-62 [Powdermill Rd]
Keep STRAIGHT onto RT-27 [Parker St]
Cross into Sudbury 
Cutting Field will be about .5 miles on the RIGHT after crossing into Sudbury

From 495 Southbound & New Hampshire:
Take Rt 3 to 495 South
Take Rt 2 East
At exit 42, turn RIGHT onto Ramp (RT-27 / Maynard / Acton)
Bear Right  Rt-27 South
Follow into Maynard and then Sudbury
Cutting Field will be about .5 miles on the RIGHT after crossing into Sudbury

From 495 Northbound
At exit 27, turn RIGHT onto Ramp (RT-117 / Bolton / Stow)
Keep LEFT to stay on Ramp (RT-117 / Stow / Maynard)
Turn LEFT (East) onto SR-117 [Main St]
Keep STRAIGHT onto SR-117 [RT-62]
Bear RIGHT (East) onto RT-117
Bear RIGHT (South) onto RT-27
Follow into Maynard and then Sudbury Cutting Field will be about .5 miles on the RIGHT after crossing into Sudbury