Hen Wallow Falls is a 90-foot waterfall in Great Smoky Mountains National Park near Cosby, Tennessee, known for its quiet forest setting and fan-shaped cascade. The hike is about 4.4 miles round trip via the Gabes Mountain Trail, rated moderate with steady elevation gain and a short, steep spur down to the falls. It’s best visited after rain or in winter when it can partially freeze, and it’s less crowded than many Smokies waterfalls.