Rainbow Falls and Grotto Falls. Along the loop, you'll see historic log cabins, gristmills and an array of wildlife, which may include birds, deer and black bears. Stop for a self-guided walking ...

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 ...