Grotto Falls - Trillium Gap Trail runs through an old-growth hemlock forest, running behind the 25-foot-high waterfall. The roundtrip distance to the trail is three miles. Hikers should prepare for a 2-3-hour trip that is moderate in difficulty.
Grotto Falls - Great Smoky Mountains Waterfall in Gatlinburg TN Grotto Falls is a stunningly beautiful waterfall and popular attraction for hikers that are visiting the area of Gatlinburg, TN. This one requires about a 3 mile round trip hike into the surreal beauty of the Great Smoky Mountains National Park on the side on Mount LeConte.