From Beltway 495/I-95 Exit 25(College Park/Beltsville), follow US Route 1 North towards Beltsville. Continue on US 1 N for approximately 1-1/2 miles. Turn right on Powder Mill Road (Rt. 212). Continue on Powder Mill Road for 2.0 miles. Turn left on Center Road (opposite the ARS National Visitors Center, known locally as the "Log Lodge"). Building 307B is the second building on your left.

From Beltway 495/I-95 Exit 23 (Kenilworth Avenue), follow Kenilworth Ave. North for several miles -- it will become Edmonston Road. Turn right at the light on Powder Mill Road and go 1.5 miles. Turn left at Center Road (opposite the ARS National Visitor Center, known locally as the "Log Lodge"). Building 307B is the second building on your left.

From the Baltimore-Washington Parkway exit on Powder Mill Road (Rt 212) and go West, following signs to BARC, for about 1.2 miles to Center Road. Turn right -- Building 307B is the second building on your left.

Parking is available immediately in front of Building 307B and further along Center Road in front of Buildings 307 and 307C.