Established in 1996, Two Rivers Memorial Park is a small park along Highway 200 in Bonner, across the road from the Flying J Truckstop. The park is a legacy of the
Milltown Superfund, the first Superfund site to be listed in Montana. The site cleanup was begun in 1983 and restoration work is ongoing.
In the park are four dedicated benches, a statue of explorer Meriwether Lewis and his Newfoundland, Seaman, a second statue of explorer and road builder Captain John Mullan, picnic tables and two sets of Montana Historical Markers, telling of the history of the area and of the Milltown Superfund cleanup project. Accompanying the Meriwether Lewis statue is an information kiosk detailing his trek through the Blackfoot Valley, during which he passed by this spot.