The Pywiack Cascade is a waterfall in Yosemite National Park within the U.S. state of California. It is located a few miles downstream from the outlet of Tenaya Lake on Tenaya Creek at the head of the steep and rugged granite gorge, Tenaya Canyon. The waterfall can be viewed from Glacier Point, or by a 6-mile (9.7 km) hike from Olmsted Point, but the canyon is dangerous and the waterfall is unsafe to be reached on foot. The waterfall is highly seasonal. It typically rages in the spring and early summer while shrinking to a trickle by late summer to mid-autumn.
The water of the Pywiack Cascade slides down a steep angle of solid granite, for a total of about 600 feet (180 m). A small waterfall lies directly below the main drop. Below that, the creek continues over jumbled talus for less than a quarter of a mile (0.4 km) before it plunges over another large waterfall. Not much farther downstream is Three Chute Falls whose waters continue on into Mirror Lake and then finally empty into the Merced River, within Yosemite Valley.
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