iPhone Cases: Alpine climbing legend John Roskelley climbing the 45 meter/148-foot Tokumm Pole above the Tokumm Creek in the scenic Marble Canyon, BC in Kootenay National Park near Banff, Alberta. The rugged, narrow slot canyon is a popular summer destination with the turquoise waters of Tokumm Creek flowing at the bottom. But in the winter it is a hotspot for ice climbing, snowshoeing, and nordic skiing.