Great Meadows, Lexington (not the one in Concord). Great Meadows is a former reservoir, owned by the town of Arlington, but located in the middle of East Lexington. Parking is available at the Waldorf School at 739 Massachusetts Ave., Lexington. There is a parking lot beside the school and another parking area down the hill toward the bike path. We’ll meet at the bottom of the hill near the playground, 3:30.