Pearl Falls is one of the highest waterfalls in Mount Rainier National Park in the U.S. state of Washington. It is fed by the glacial Pearl Creek, occurring about halfway along the creek's course. The falls plunge about 400 feet (120 m) off a sheer columnar basalt cliff, unbroken for almost 200 feet (61 m), into an amphitheater-like basin, similar in form to the main drop of nearby Comet Falls. The columnar basalt was likely formed by cooled eruptions of Mount Rainier, which is a stratovolcano. Near the base, it crashes onto a rock ledge and fans out towards the left bank, before dropping again vertically onto a pile of talus and cascading downwards. It is located in a steep canyon on the southwest face of Mount Rainier. Pearl Creek drains to another glacial stream, Pyramid Creek, which pa