His father, Hugh Monroe (spelled Munro at the time), was a captain in the British Army and his grandfather was Capt.
His mother, Angelique de la Roche, née Leroux,[1] was the daughter of a royal family who was part of the French Emigration.
[3] Monroe traveled with the Pi'ikanni Nation under the care of Chief Lone Walker for two years and became a liaison between them and Hudson's.
From 1853-1854, Monroe served as a guide and interpreter for Governor Isaac Stevens who was the first to make a treaty with the Blackfoot Confederacy the following year in 1855.
After his death, his close friend and author James Willard Schultz named the peak after Monroe.