He was the first European to describe this lake and Lake O'Hara .
Lake McArthur is named after James Joseph McArthur ( 1856 -- 1925 ) of the Dominion Topographical Survey .
Lake McArthur was the first European to describe this lake and Lake O'Hara .
Lake McArthur is named after James Joseph McArthur ( 1856 -- 1925 ) of the Dominion Topographical Survey .