Montana is not known for its hauntings but it has some scary tales. The ghosts of The Glacier Park Lodge in Glacier National Park like to keep the employees on their toes. The Dumas Brothel is still haunted by the energy from escapades of the past.

Sources:
Glacier Ghost Stories: Spooky Tales and Legends from Glacier National Park by Karen Stevens
https://anomalien.com/ghost-of-the-dumas-brothel/
https://en.wikipedia.org/wiki/Dumas_Brothel
http://bozemanmagazine.com/articles/2013/09/30/22206_a-montana-ghost-story-from-the-dumas-brothel
https://historygoesbump.blogspot.com/2016/04/hgb-ep-120-dumas-brothel.html