Located along the Trillium Gap Trail – off the Roaring Fork Motor Nature Trail – Grotto Falls is a nearly 3-mile-long, round-trip hike that actually runs behind a 25-foot waterfall. Summer hikers love the cool environment through the old-growth hemlock forest and by the falls, although park officials caution that swimming or climbing on rocks near the falls is prohibited. 

Although some recent visitors said Grotto Falls was doable for amateur hikers, most cautioned that the rough and slippery trail – and its exposed tree roots – is not recommended for novices or children. Many also commented on the uphill climb and the stream crossings, which can be very slippery, but all visitors were impressed with the amazing waterfall. Reviewers recommended wearing sturdy hiking shoes with good traction and carrying both bear and bug spray. 

The Trillium Trail to Grotto Falls can be accessed from the No. 5 stop on the Roaring Fork Motor Nature Trail. Access to the falls is free. For more information, visit the NPS website.