From the North:  
Exit 12 off of I-90. Take Route 9 South to Route 9H.  Take Route 9H South approximately 16 miles to the intersection of State Route 23. Turn left and head East on Route 23 for approximately 9 miles to the intersection of County Route 11a (Beauty Award Hwy.). Turn right on County Route 11a; the school campus will be 1000 feet in on the left.
OR 

Take the Taconic State Parkway (TSP) south to the Hillsdale/Claverack Route 23 exit.  At stop sign off exit ramp take a left onto Route 23 heading east for approximately 4 miles to the intersection of County Route 11a (Beauty Award Hwy.)  Turn right on County Route 11a; the school campus will be 1000 feet in on the left.

From the South:  Take State Route 9 North to Route 9H. Take Route 9H North to State Route 23.   Turn right and head East on Route 23 for approximately 9 miles to County Route 11a (Beauty Award Hwy.). Turn right on Route 11a; the school campus will be 1000 feet in on the left.
OR
Take the Taconic State Parkway (TSP) north to the Hillsdale/Claverack Route 23 exit.  At stop sign off exit ramp take a right onto Route 23 heading east for approximately 4 miles to the intersection of County Route 11a (Beauty Award Hwy.)  Turn right on County Route 11a; the school campus will be 1000 feet in on the left.

From the East:  Take Route 23 West from Great Barrington, MA to the intersection of Route 22.  Continue West on Route 23 for about 5 miles to the intersection of County Route 11a (Beauty Award Hwy.). Turn left onto County Route 11a; the school campus will be 1000 feet in on the left.

From the West:  Exit the NYS Thruway at the Catskill exit.  Head East on State Route 23 across the Rip Van Winkle Bridge. Continue East on Route 23 for approximately 5 miles to the intersection of Route 23 and Route 9H. Turn left and head north on Route 9H to the intersection of Route 23/23B.  Turn right and head East on Route 23 for approximately 9 miles to the intersection of County Route 11a (Beauty Award Hwy.). Turn right onto County Route 11a, the school campus will be 1000 feet in on the left.

  Google Maps - Yahoo! Maps - MapQuest