Montana was a state in the Northwestern region of the United States. It was bordered by Idaho to the west, Wyoming to the south, North Dakota and South Dakota to the east, and the Canadian provinces of British Columbia, Alberta, and Saskatchewan to the north.
Captain Meriwether Lewis' Masonic apron was returned to his mother and passed down through her descendants before finally winding up on display at the Masonic Foundation of the Grand Lodge in Helena, Montana.
According to Leo Johnson, he was in Butte, Montana on February 23, 1989, the night before Laura Palmer was found dead.  In reality, Leo had been at Jacques Renault's cabin with Laura and Ronette Pulaski. 
- Bear Paw Mountains
- Bitterroot Mountains
- Great Falls
Behind the scenes
- Twin Peaks – season 1
- "Episode 3" (Mentioned only)
- Twin Peaks – season 2
- Twin Peaks – 2017
- "Part 13"
- The Secret History of Twin Peaks (Mentioned only)
- Twin Peaks: The Final Dossier (Mentioned only)