The Westfield River, which runs at the outermost perimeter and most of the park's terrain was created by glaciers (the Hitchcock glacial lake/Laurentide ice sheet) as they retreated 15–20,000 years ago.
Along the perimeter of the park and across most of its terrain, the Westfield River flows; this river formation occurred due to glaciers (the Hitchcock glacial lake/Laurentide ice sheet), which receded approximately 15–20,000 years ago.