The Nashua in Groton/Pepperell MA is a great spot for an early Autumn paddle. The many side channels and twists and turns (go to Nod Rd Groton MA on google maps for a preview) offer a wide range of scenery and this time of year the colors can be spectacular. See the flatwater calendar for directions. Note: the calendar says this could be up to a 10 mile paddle, I anticipate doing about half that. Hope to see you there.