From Philadelphia

Take I-76 (Schuylkill Expressway) west to King of Prussia and Exit 328A – Route 422.  Take Route 422 to exit for Route 23 and Valley Forge Park.  Turn left at end of exit ramp and follow Route 23 West through the park and Phoenixville.  Turn left at end of exit ramp and follow Route 23 West through the park and Phoenixville. Turn left on Route 113 south.  Go 1.8 miles and turn right into the fairgrounds at flashing yellow traffic light.

Or, for a scenic route that avoids Phoenixville:

Take I-76 west to King of Prussia and Exit 328A – Route 202 South (towards West Chester).  Take Devon exit and turn right at light onto Route 252.  Go 2.7 miles and turn left on Valley Forge Road – Route 23.  Go 0.6 miles and bear left on Valley Park Road (just after Valley Forge Post Office on right).  Go 2.3 miles and bear right on S. Whitehorse Road.  Turn left on Pothouse Road immediately after crossing the Pickering Creek and go 2.4 miles to dead end.  Turn left on Route 113 and go less than 1 mile to yellow flashing traffic light at entrance to fairgrounds.  

From the East (New Jersey) and North (Allentown)

PA Turnpike to Exit 326, Valley Forge.  Turn right after toll gate to North Gulph Road and Valley Forge Park.  Take Route 23 west, through Valley Forge Park and Phoenixville.  Turn left on Route 113 south.  Go 1.8 miles and turn right at flashing yellow traffic light.  (Or follow alternative route above, bearing left off Route 23 onto Valley Park Road just after passing the Valley Forge Post Office on the right.)

From the West (Harrisburg)

PA Turnpike East to Exit 312, Downingtown.  Take Route 100 south and east to Route 113.  Turn left on 113 (north).  Cross Route 401.  Continue to traffic light at Coldstream Road.  Go through the traffic light and .2 mile further.  Turn left at the flashing yellow traffic light.

From the South (Delaware)

I-95 North to Route 202 North.  Take exit for Route 401.  Bear left at bottom of ramp onto Route 401 west.  Take Route 401 west to Route 113 north.  Turn right onto Route 113 and continue to traffic light at Coldstream Road.  Go through that light and turn left at flashing yellow traffic light.