Traders from Fort Benton in Montana Territory established Fort Hamilton in 1869, trading buffalo robes and fur for firearms, ammunition, and illegal whiskey with the Blackfeet.  The fort, later dubbed Fort Whoop-Up because of its illicit activities, quickly became the American trade headquarters in southern Alberta.  The Mounties began their westward march to curtail the whiskey trade in 1874. 

 






Their first stop was Fort Whoop-Up.  When the purchase price for the fort was too high, the Mounties established a post by renting one of the buildings from the American traders.  Fort Whoop-Up was the first stop along the western branch of the Old Forts Trail from Fort Benton until the railroad supplanted river traffic in the mid-1880's.  The NWMP remained at the fort until 1892, even after fire destroyed their rented building in 1888.  By 1915 only piles of stones and depressions, where fireplaces and cellars once had been remained at the site.