Located along the Trillium Gap Trail – off the Roaring Fork Motor Nature Trail – Grotto Falls is a nearly 3-mile, out-and-back hike that runs behind a 25-foot waterfall. It's the only ...

The Roaring Fork Motor Nature Trail, a nearly 6-mile-long ... to two of the region's most popular waterfalls: Rainbow Falls and Grotto Falls. Along the loop, you'll see historic log cabins ...