Piedra Falls Professional Review and Guide
"The East Fork of the Piedra River pours from an unnamed lake at 11,000 feet in the San Juan Mountains, and travels southwest for 11 miles, to the Piedra River. At Piedra Falls, it surges through a narrow cleft, plunges over volcanic rock, and explodes in a thundering mist.
Of all the trailheads in this book, Piedra Falls Trailhead is the most difficult to find, but the hike itself is short, and the waterfall is spectacular. Piedra Falls Trail (#671) begins
on a gravel road at the edge of the parking area, and follows the river upstream. The trail veers left, travels through the forest, and then curves right to meet up with the river again. You’ll traverse a steep slope on a narrow path and enter a canyon filled with volcanic rock."