In 1889.
1889. North and South Dakota, Montana, and Washington become states
North Dakota South Dakota Montana Washington
North Dakota and South Dakota were admitted to the union on November 2, 1889 as the 39th and 40th states. Montana was admitted to the union on November 8, 1889 as the 41st. state. Washington was admitted to the union on November 11, 1889 as the 42nd state.
Montana and Idaho are located between Bismarck, North Dakota and Olympia, Washington.
North Dakota (1889), South Dakota (1889), Montana (1889), Washington (1889), Idaho (1890), Wyoming (1890)
Washington Montana North Dakota
North Dakota and Montana border Saskatchewan.
Washington (part), Idaho, Montana, North Dakota, and Minnesota (part).
Colorado, Idaho, Montana, North dakota, south dakota, Utah, washington, wyoming, and oregon
Those six states are: North Dakota South Dakota Wyoming Washington Montana Idaho
montana, washington, nebraska, south dakota, idaho
Washington, Montana and North Dakota