Bear Swamp is a forested parkland in Ashfield, Massachusetts. The Trustees of Reservations owns and maintains the property. Although Bear Swamp was once a sheep pasture and later a source of cordwood and lumber, it now seems much like an untouched wilderness. The landscape is irregular, well-drained, and covered with nutrient-rich soils. Protected from the elements, hardwood trees such as ash, hickory, basswood, maple, and cherry grow straight and tall.