The 293-acre Fort River Division, located in Hadley, is named after the major body of water flowing through it: the Fort River. This river is located in the eastern portion of the Pioneer Valley, drains a 35,830-acre watershed, and is the longest free-flowing tributary to the Connecticut River in Massachusetts. There are a variety of habitat types found within this division, including hardwood forests, floodplain forests, and grasslands. 

A one-mile-long, fully accessible natural trail is located at the Fort River division. The trail is open to the public from sun up to sun down, year-round. This division is open to the public for hunting, fishing, wildlife observation and photography, environmental education, and interpretation. The Fort River Birding and Nature Trail is located at 69 Moody Bridge Road, Hadley. 

Fort River Trail (Birdability) webpage