Name Notes: Named in 1908 by Mary Schaffer after Sidney Unwin who first ascended the peak and was the guide and companion of Mary Schaffer-Warren on their 1907 and 1908 pack horse trip. After numerous frustrating days of looking for Maligne Lake from a sketch map, Sid Unwin climbed the highest peak near their camp, determined to find it. After 24 hours he returned triumphant, having seen the lake from the mountain now called Mount Unwin.
Unwin was one of the most highly skilled trail guides in the Early history of the Rockies. He was born in London England but was drawn to the Rockies where he started an outfitting business. B.W. Mitchell wrote of Unwin, "Unsurpassed in woodcraft and resourcefulness, unequaled in thoughtful kindness to his party, and with the charm of courteous manner that adds the final touch of perfection to the little self-centred microcosm that a party in the wilderness constitutes."
When World War I started Unwin's sister Ethel took over his business and he enlisted in the Canadian Army and was subsequently assigned to the 20th Artillery Battery at Lethbridge. The Battery experienced its first battle action in France in January 1916 and later was part of the the Battle of Vimy Ridge.
Unwin was critically wounded after ordering all of his men back to the dugouts and manning an artillery battery by himself, firing and loading under intense fire. His Commader Lieutenant E.K. Carmichael wrote, "I was so much pleased with, and admired his conduct, that I committed the circumstances to paper at once in case of accidents, so that if anything did happen to me, the paper would bear witness." While in a military hospital Sid wrote the following before dying "Aside from having my right arm blown off, being almost stone deafened by shell fire, and having my head full of shrapnel fragments, I'm fine and dandy."