Generally considered a moderately challenging route, it takes an average of 3 h 10 min to complete. This is a very popular area for hiking, so you'll likely encounter other people while exploring. The best times to visit this trail are March through November.

The difficulty of a hike to Rainbow Falls depends on which location you are visiting, but the famous trail in the Great Smoky Mountains is considered a moderately strenuous hike. The round-trip distance is approximately 5.4 miles with a steady elevation gain of about 1,700 feet. The terrain is often rocky and can be quite slippery, especially near the falls where mist keeps the boulders wet; sturdy hiking boots are highly recommended. Conversely, the Rainbow Falls hike in Rainbow Falls Provincial Park (Ontario) is much shorter and rated as moderate, involving a 2.2 km trail with well-maintained boardwalks and stairs that lead to viewing platforms. Regardless of the location, the "hardness" usually comes from the incline and the potential for uneven footing, so hikers with basic fitness levels should plan for a slower pace and bring plenty of water.