Along with the adjacent conservation lands, Gray Reservation provides an outdoor museum of geologic features carved by the last glacier. Most striking is the 40-foot-high ice-contact face that rises just south of Hop Brook. The top of the face is pitted by kettle-holes that were formed when sand and gravel settled around chunks of ice left behind by the glacier. Eskers also wind through the property, and the glacier also left behind erratics, a drumlin, and a kame terrace.
Glacial Features Walk: Enjoy a self-guided tour of the glacial features at Gray. Use your cell phone or mobile device to scan QR codes to listen to a narrated tour or read a transcript of the narration.