Yes, it is possible to see the Northern Lights, or aurora borealis, in Banff National Park, although it is not as common as in more northern regions. The best chances for viewing are during the fall and winter months, on clear nights with high solar activity, away from the light pollution of the town. Locations such as Lake Minnewanka and the Vermilion Lakes offer dark skies that can increase your chances of witnessing this natural phenomenon.