The largest glaciated areas include the Waputik and Wapta Icefields, which both lie on the Banff-Yoho National Park border. Wapta Icefield covers approximately in area. Outlets of Wapta Icefield on the Banff side of the continental divide include Peyto, Bow, and Vulture Glaciers. Bow Glacier retreated an estimated between the years 1850 and 1953, and since that period, there has been further retreat which has left a newly formed lake at the terminal moraine. Peyto Glacier has lost 70 percent of its volume since record keeping began and has retreated approximately since 1880; the glacier is at risk of disappearing entirely within the next 30 to 40 years.