The Charles River Greenway goes for miles along the Charles River. This stretch is relatively busy during peak hours but offers good views of Boston. It's 9 miles one-way, starting at Watertown Square and ending in Lederman Park. So plan for a 18 mile out-and-back trip.
Explore our Appalachian Trail (AT) section hikesMt. Katahdin, Maine
Explore our Pacific Crest Trail (PCT) section hikesJMT/PCT Duck Pass Trailhead to Vermillion Valley, California