Grotto Falls Professional Review and Guide
"This waterfall gets its name from the rockhouse behind the falls. The hike, near Gatlinburg, heads along the north slope of Mount LeConte, weaving its way to aptly named Roaring Fork, where you will find the tumbler jumping off a rock rim into a rock-lined pool. Interestingly, the official trail takes you behind the falls, through the grotto for which it is named.
This can be a busy hike, especially during midsummer. Even then, early and late visitors will be fine. The hike leads to curious Grotto Falls, spilling over a deep rock overhang more commonly seen on the Cumberland Plateau.
Enjoy walking amid old-growth forest of Carolina silverbell, black birch, and yellow birch. The park has preserved some virgin hemlock, too. You will then wind in and out of small watersheds, working toward Roaring Fork, on the cool north slope of Mount LeConte."