From the metro:

Take the Red Line to the Friendship Heights stop. After exiting the metro, walk north on Wisconsin Ave. The Barlow Building is located on the west side of Wisconsin Avenue, just past the intersection of Wisconsin Ave and Willard Ave.

Driving from Washington, DC and points south:

Take Wisconsin Avenue north to just over the District line at Western Avenue. Take the next left at Willard Avenue, and the first right on to Hill Plaza. The entrance to the Barlow Building parking is at the second driveway on your right. Paid parking is available in the Barlow Building, and at other locations nearby.

Driving from Maryland and points north:

Take Wisconsin Avenue south to just before the District line. Approximately one mile past Bradley Blvd., you will pass the Barlow Building on your right. Take the next right on to Willard Avenue and follow the above directions to parking.