Despite being only 23m high, Athabasca Falls is Jasper’s most dramatic and voluminous waterfall, a deafening combination of sound, spray and water. The thunderous Athabasca River has cut deeply into the soft limestone rock, carving potholes, canyons and water channels. Interpretive signs explain the basics of the local geology. Visitors crowd the large parking lot and short access trail. It's just west of the Icefields Pkwy, 30km south of Jasper Town, and at its most ferocious during summer.