below treaty creek the bell-irving is joined by deltaic creek from the east, then wildfire creek from the west, then taft creek from the northeast. continuing south, the bell-irving is flanked on the west by wildfire ridge, which separates it from bowser lake. ritchie creek and cousins creek, flowing down from mount ritchie, join the bell-irving from the east. a few kilometers south the bell-irving river is joined by the bowser river from the west. the bowser river flows from summit lake and through bowser lake, and collects water from many large glaciers.