French fort built by ten voyageurs sent ahead by de Niverville in 1751, on the Saskatchewan river near site of present city of Calgary. Named after the Governor of New France. St. Pierre in his Memoirs (Masson) says that it was a stockaded fort. It was not maintained after the French withdrew in 1759.

On its site in 1875 Capt. Brisebois of the Royal North West Mounted Police founded a post called Fort Brisebois which grew to be the city Calgary. Capt. Brisebois stated that he had found traces of old fort La Jonquiere on the spot.

The North West Co. erected a fort about 50 miles west of old La Jonquière in 1802 to which the name Bow River Fort was given. This fort was closed about 1823.

Shown on map No. 3 of North West Territories from Dr. Coue's Henry-Thompson Travels.