Your GPS should get you here by punching in the address:

18393 Blueridge Mountain Road - Bluemont, VA 20135

From Washington, D.C

Travel Time: Approximately 1 hour, 15 minutes

Follow Rt. 66 or I-495 to the Dulles Toll Road (toll)
Follow the Toll Road west toward the Dulles Greenway (toll)
Follow the Dulles Greenway West till it ends near Leesburg, VA
At the end of the Greenway follow the exit toward Route 7 West

Alternative Route: Follow Route 7 West from I-495. (This is much slower going, but there are no tolls)

Go 20 miles west of Leesburg
Pass the town of Round Hill
Climb the mountain
Look for flashing yellow sign to indicate Rt. 601
Turn left onto Rt. 601 (Blueridge Mountain Rd)
Go about a half a mile and turn right at the first driveway (sign says Bears Den)
Follow gravel driveway

From Leesburg:

Take Highway Rt. 7 West
Go 20 miles
Pass the town of Round Hill
Climb the mountain
Look for flashing yellow sign to indicate Rt. 601
Turn left onto Rt. 601 (Blueridge Mountain Rd)
Go about a half a mile and turn right at the first driveway (sign says Bears Den)
Follow gravel driveway

From Winchester:

Take Highway Rt. 7 East for 20 miles
You will pass the town of Berryville, cross the Shenandoah River and climb the mountain
Look for flashing yellow sign to indicate Rt. 601
Turn right onto Rt. 601 (Blueridge Mountain Rd)
Go about a half a mile and turn right at the first driveway (sign says Bears Den)
Follow gravel driveway