Since my initial survey of Montana historic places in 1984-1985, Montana state parks has established several small but significant historic parks. One of these, Tower Rock State Park, is viewed by hundreds of drivers daily, as it is located directly on Interstate I-15 along the Missouri River Canyon in southern Cascade County.

Native Americans traveling from their Rocky Mountain homelands into the game-rich high plains, used the rock formation, over 400 feet high, as a landmark between the two regions. The Bitterroot Salish, Lower Kootenay, and the Piegan Blackfeet are all associated with the place. For the Piegan Blackfeet it was and is a sacred place. Groups camped in the vicinity between the Rock and Missouri River.

When on July 16, 1805 Capt. Meriwether Lewis of the famous Corps of Discovery encountered the Rock on his journey west, he noted the presence of what he called an “Indian road” around the Rock. He then decided to name the place and wrote in his journal: “this rock I called the tower. it may be ascended with some difficulty nearly to its summit, and from it there is a most pleasing view of the country we are now about to leave. from it I saw this evening immence herds of buffaloe in the plains below.^”

The surrounding region’s development took place in the late 19th century, accelerated by the decision of the Manitoba Road to built through the canyon a rail link connecting Great Falls, Helena and Butte. This line became known as the Montana Central Railroad.

In the early 20th century came an automobile route, U.S. Highway 91, and then the interstate highway in 1968. Interestingly, the property’s official designation as a historic site came much later. Tower Rock was listed in the National Register of Historic Places in 2002. Two years later, it became a state park of about 140 acres.

The park is day-use only but there is adequate public interpretation. There is also a maintained trail to the Rock’s base, allowing for a more direct experience with landscape and some mitigation of the noise from the highway. The importance of the place deserves a more robust treatment but perhaps more can come in the future ( and the adjacent disposal center can be moved to a more appropriate location).