https://youtu.be/Me7BQrReB8E To hike the Rainbow Lake and Hanging Lake trails, a total of 15 miles with a 3,670 ft elevation gain. Rainbow Lake is located in Whistler and is one of the area's most scenic and pristine alpine lakes. It is a source of Whistler's drinking water and therefore, swimming in the lake and camping at the lake are not permitted. Camping is allowed at Hanging Lake, which is..