This is a popular whitewater run that is best run at high and medium water levels. Put in along MA 2 at the railroad bridge just west of the center of Erving. There is a Class III rapid just below the railroad bridge that is best run on the left. Classes II and III rapids carry you to the Iron Bridge in Farley. From here the river becomes Classes III and IV rapids and there is not a take-out spot until after all the large waves. The river also contains a great surfing wave and a funnel. The funnel can be portaged if you choose. This is the last exciting wave of this run and the river calms down to the take-out on river left just below the Paper Mill Road bridge.