Trillium Gap Trail meanders through an old-growth hemlock forest and actually runs behind the 25 foot high waterfall. The cool, moist environment near the falls is ideal for salamanders and summer hikers. The hike is 3 miles roundtrip and considered moderate in difficulty.

The difficulty of "The Grotto" depends on which world-famous location you are visiting. In Zion National Park (Utah), the Grotto Trail is a very easy, 1.2-mile round-trip walk. It is mostly level, well-paved, and family-friendly, serving as a connector between the Zion Lodge and the Grotto picnic area. However, if you are referring to The Grotto in Bruce Peninsula National Park (Ontario, Canada), the hike is considered moderate. While the main trail (Georgian Bay Trail) is wide and flat, the final descent into the Grotto itself requires scrambling over sharp, slippery limestone rocks and steep cliffs. In 2026, the park requires advance reservations for parking, and rangers often warn that the rocky terrain can be treacherous in wet weather. It is not "hard" in terms of cardio, but it requires good balance and sturdy footwear. For the Zion version, you can wear flip-flops; for the Ontario version, hiking boots are highly recommended to avoid ankle injuries on the jagged rocks near the water's edge.