If you have a boat, you can launch it from a dirt parcel along the river next to the 27 bridge on the north side. You also can launch it at Tailrace Marina. I think there is also a canoe launch in the public park.
If you want to rent a boat, they have them (including pontoons) at Tailrace Marina.
Of course, there is the whitewater park across the river off Hwy 27.
Information for the new Mt. Holly resident