Merrill Park provides Hudson's only public access to the Merrimack River, featuring a secluded location with limited parking at the entrance and a path leading down to the riverbank suitable for carrying canoes and kayaks.

The small park offers a few picnic benches and carry-in access for non-motorized watercraft, though efforts to develop motorboat access and improve facilities have been ongoing.

A $30,000 grant was secured in 2022 to rehabilitate the area and install a non-motorized boat launch.