From points north: take Capital Beltway outer loop, I-495 west or south (from the Baltimore area, it will be I-495 west); take exit 46A, Rte 123, west to Vienna; once in Vienna, turn right on Park St. (Amoco Station on right, at corner); turn left at next stop sign, Church St.; turn right at next stop sign, Mill St.; turn left at next stop sign, Ayr Hill Ave.; go a half block, parking lot in on left.
From points south: take Capital Beltway inner loop (I-495 north); take exit 49A or 49C, I-66, westbound; take exit 62 Nutley St (Rte 243) northbound towards Vienna; turn right onto Rte 123, Maple Ave; turn left onto Lawyers Rd (Rte 673); go three blocks, then turn right on Ayr Hill Ave; go two blocks to Dominion Rd; at stop sign, go straight, through intersection, then turn right immediately into parking lot.
Note: from points southeast, e.g., MD Rtes 210, 5 or 4, take I-495 west (inner loop), this becomes I-495 north, then follow directions "From points south."
From DC/Arlington: get onto Rte I-66 west; take exit 62 Nutley St (Rte 243) northbound towards Vienna; turn right onto Rte 123, Maple Ave; turn left onto Lawyers Rd (Rte 673); go three blocks, then turn right on Ayr Hill Ave; go two blocks to Dominion Rd; at stop sign, go straight, through intersection, then turn right immediately into parking lot.