Experience the LONGEST zipline in Canada and the United States in Whistler, British Columbia. This is the ultimate zipline adventure, spanning a mind-blowing distance of more than 1.2 miles (2 kilometers) down Blackcomb Mountain. Experience spectacular views over forests, lakes, peaks, rivers — even a glacier. It's more than 7,000 feet of pure exhilaration. The use of a helmet and harness is included. This guided adventure is available from mid June to October (Canadian Thanksgiving).