This mountain was named in 1918 in honour of Lt. Sir Henry James Warre. Lt. Warre crossed the Rockies with Lt. Mervin Vavasour in 1845-46 on a reconnaissance to determine what military action should be taken if there should be a war with the U.S. Lt. Warre of the 14th Regiment and Lt. Vavasour of the Royal Engineers were ordered by the Governor General to cross the rockies disguised as private adventurers and evaluate the mountain passes from a military point of view. They concluded that “the idea of transporting troops . . . with their stores, etc. through such an extent of uncultivated country and over such impracticable mountains would appear to us quite infeasible.”