Hidden Lake is a small glacial lake in the Skoki Valley of Banff National Park, Canada. It is located in the Slate Range of the Canadian Rockies. The lake can be reached by following a hiking trail for 8.4 km starting at Fish Creek, at the base of the Lake Louise Ski Area, near Lake Louise. A backcountry campground is situated one km before reaching the lakeā¦Hidden Lake is a small glacial lake in the Skoki Valley of Banff National Park, Canada. It is located in the Slate Range of the Canadian Rockies. The lake can be reached by following a hiking trail for 8.4 km starting at Fish Creek, at the base of the Lake Louise Ski Area, near Lake Louise. A backcountry campground is situated one km before reaching the lake. The lake is the starting point for possible ascents of Mount Richardson, Pika Peak and Ptarmigan Peak.