Take the Baltimore-Washington Parkway (Route 295) North to Greenbelt Road (Route 193). Take Greenbelt Road East for approximately two miles. The main gate will be on the left at the first traffic light after Cipriano Road. Visitors not on NASA business should continue on to the next traffic light and turn left onto Soil Conservation Road. Turn left at the first opportunity to reach the Visitor Center.

From Baltimore:

Take the Baltimore-Washington Parkway (Route 295) South to the Beltsville Agricultural Research Center. Exit at Powder Mill Road and follow the signs to the Goddard Visitor Center. If you are on official business, continue past the turn for the Visitor Center to the next traffic light (Greenbelt Road). Turn right on Greenbelt Road, then turn right at the next traffic light to enter the main gate.