FROM BOSTON:

Follow I-93 to I-91
Continue on I-91 to exit 26 (Orleans, VT)
Go north via Route 5 to Route 14 North
Then go south on Route 100
Take a right in center of Troy onto Route 101 North
Turn left onto Route 242
We are located about 4 miles past the Jay Country Store on the Right 

 

FROM BURLINGTON:

Go north on I-89 to Exit #19, St. Albans
Go northeast on Route 104 to the Junction of Route 105
Continue on 105 East to East Berkshire
Take a right onto Route 118 South
Follow to Montgomery Center
Turn left onto Route 242

 

                                        From Albany:

                                      
 

Take the New York thruway to Albany
Take the Northway 87 to Rouses Pt., NY, Exit 42
Go east to Vermont via Routes 9, 11, 2, 78 to Sheldon East Junction
Go onto 105 East to East Berkshire
Take a right onto Route 118 South
Follow to Montgomery Center
Turn left onto Route 242 East

 

FROM MONTREAL:

Take the Champlain Bridge, Eastern Township Autoroute 10 East to exit 106 at Eastman, QC
Follow Route 245 South to South Bolton
Take Route 243 South through Mansonville to the Highwater, QC/North Troy, VT border
Take a right onto Route 101 South for approximately 3 miles
Turn right onto Route 242

These directions take you through the North Troy, which is the easiest, most direct route from Montreal, but there are several other border crossings that might be convenient depending on where you're travelling to/from:
-Richford and Berkshire are also very close (and more convenient if you're staying on the Montgomery side of the mountain). 
-There are also 3 ports of entry near Newport just off the Eastern Township Rt. 55: Rt. 91 at Derby Line, the town entrance at Derby, and the Beebe entrance as Beebe, QC.