The 176 acre Mountain Meadow Preserve consists of forest, fields, and wetlands along the Williamstown, MA – Pownal, VT border. The site, which drapes the summit of Mason Hill from southwest to northeast, is owned by The Trustees of Reservations. Mason Hill is underlain by quartzite, while its eastern flanks have alkaline dolostone bedrock. The entire site is overlain by Pleistocene deposits. The western trail encircles and cuts through a spectacular upland wildflower meadow that is the remnant of 20th Century post-agricultural activity. The northeastern portion of Mountain Meadow consists of oak-dominated forests punctuated by wetlands.