The Mossy Cave Trail is easy and mostly level, following beside the fast-flowing, sediment-laden stream, across two footbridges to a junction. The left fork has a short but steep climb through a patch of pine woodland to the cave, actually just a wide, mossy overhang in the Claron limestone, kept moist by water dripping from the ceiling. This freezes in winter, and the large ice pillars beneath do not fully melt until midsummer, partly as the cave faces northeast and hence receives no direct sunlight. The soil at the base of the grotto is often soft and muddy so the path ends at the edge; the NPS discourage people entering the alcove in order to protect the delicate hanging gardens, so there isn't much to do apart from taking photographs but the cave is interesting enough.
The right branch of the trail leads a little further upstream to the waterfall, where the stream tumbles 15 feet over a ledge into a circular pool; above is a swirling channel and several quite deep potholes, formed by the water eroding into the soft, orange-colored limestone. Further erosion is slowed by an underlying layer of much harder dolomite. Apart from small hoodoos and other minor formations lining the cliffs above the stream, the surroundings are wooded and gently undulating - not as scenic as the more famous section of the national park to the south, though walking off-trail further up Water Canyon might be quite interesting. If not then half an hour is enough to see both Mossy Cave and the waterfall.