Jasper comes alive in summer. Here are five things to do while you’re there:The Athabasca Glacier at the Columbia Icefield is 6 km long, up to 300 metres thick and studded with caves, cravasses (cracks), seracs (columns and ridges) and millwells (holes where water flows). Get there by the scenic Icefield Parkway, then venture onto the ice during a guided tour. Note: It’s dangerous to glacier icewalk on your own. This off road (but easy) cycling loop offers views, a beach and luxury hotel amenities.