Hunlen Falls, originally called Mystery Falls is a waterfall in the Pacific Ranges of the Coast Mountains of British Columbia, Canada, located in Tweedsmuir South Provincial Park to the west of the communities of Tatla Lake, Kleena Kleene and Nimpo Lake. It is the second-highest waterfall in British Columbia, after Della Falls on Vancouver Island, and measures a total of 1300 feet, falling from the north end of Turner Lake 850–900 feet into a box canyon, then another 400 feet into the Atnarko River, a tributary of the Bella Coola River. The watercourse between Turner Lake and the Atnarko is named Hunlen Creek. The name is that of an Indian chief who had traplines in the area.