Although the Neponset River Greenway totals more than 5 miles in length, it's currently open in several short disconnected sections on the southern outskirts of Boston. The trail is paved and provides a variety of scenery from urban wilderness through a mill village and a salt marsh (in Pope John Paul II Park) to Tenean Beach on the mouth of the Neponset River.
In the future, the rail-trail will total 10 miles, connecting the several-thousand-acre Blue Hills Reservation to the John F. Kennedy Library, the University of Massachusetts at Boston, and downtown Boston.
Parking is available on the eastern half of the trail in Pope John Paul II Park.
The trail is also adjacent to three Massachusetts Bay Transportation Authority (MBTA) Red Line stations at Butler, Milton, and Central Avenue.