From the parking lot, the well-marked trail drops steeply down to Hamilton Creek. At the well-marked junction at the bottom, go left on the Canyon Trail. The path winds along the south bank of the creek for about .7 mile to the confluence with the Pedernales River. Return via the same route to the junction and hike upstream to the pool. The large grotto with its waterfall and turquoise green pool is impressive.
Cliff swallows nest high up on the overhanging cliffs surrounding the grotto.
Ferns sprout from seeps in the walls. If it's hot and you have shorts or a swimsuit, jump into the water. Supposedly, the pool is as much as twenty-five feet deep. During other times of the year, especially on weekdays, you may see no one at all. In late October and early November, the cypresses turn burnt orange, making the creek especially scenic.