Schuylkill River Trail

Kelly Drive and Martin Luther King Drive loop Philadelphia's river run starts behind the Museum of Art and follows the paved trail along Boathouse Row. Keep going to the Falls Bridge in East Falls, cross, and come back down the other bank for a lap of a little under nine miles. The west side is the bonus: Martin Luther King Drive closes to cars entirely on weekends and holidays from April to October, so you get a whole road beside the river. Turn back early on the Kelly Drive side for something shorter.