Historical Montana State Maps

Yellowstone National Park Boundaries - 1895 - 23 x 24.31
Yellowstone Grand Teton National Parks Boundary 1929 - 23 x 36
Oregon Washington Idaho Montana - Campbell 1879 - 23 x 29.14
Montana Territory - Cram 1875 - 31 x 23
Montana Territory - Delacy 1872 - 34.5 x 23
Montana - Ide 1890 - 36.13 x 23