State Highway 115 serves as an east–west route in central Minnesota between the communities of Randall, Camp Ripley, and Ripley Township.

The route passes by the entrance of, and therefore serves, the Camp Ripley Military Reservation; north of the city of Little Falls.

[3] A portion of Highway 115 serves as the southern border for Camp Ripley.

The Camp Ripley Bridge carries both the highway and the railroad spur to Camp Ripley over the Mississippi River.

[3] Before nearby Highway 371 was rebuilt as a four-lane freeway on its new alignment between the city of Little Falls to just north of Camp Ripley Junction, the eastern terminus of Highway 115 at Highway 371 was previously a 3-way "Y" intermixed with railroad tracks.