Idaho and Wyoming border the south of Montana.
There are six states that border the Rocky Mountain region: Montana, Idaho, Wyoming, Colorado, Utah, and New Mexico.
On the border with Canada, between Idaho and the Dakotas. Wyoming is south of it.
Idaho
It is a Western state between Idaho and North Dakota on the Canadian border.
Very short, Idaho and Montana share a common border!
It is in the Northwest corner of Wyoming. On the border with Idaho and Montana.
Idaho borders Montana to the west.
The US states that border Alberta are Montana and Idaho.
There are no states north of Idaho, Montana borders Idaho to the east, although because of Idaho's shape Montana does, for a section of southern Idaho, border Idaho's southeastern part.
Montana borders Idaho to the west.
North Dakota, South Dakota, Wyoming, and Idaho all share a border with Montana.