Very often hotel packages or sightseeing combos will include tickets to this outdoor hot springs. Hence, you probably don’t want to just buy tickets for hot springs. Usually there are a lot of people. Personally I prefer less crowded outdoor hot tubs such as the one in Deer Lodge in Lake Louise.
February 3, 2011: Banff Upper Hot Springs outdoor pool in Winter
February 3, 2011: A giant buffalo or bison ice sculpture in front of Banff Upper Hot Springs