The Puyallup Glacier is a glacier on the west flank of Mount Rainier in Washington. It covers and contains 10.2 billion ft3 (289 million m3) of ice. Sharing the same source of ice as the northern South Mowich Glacier, the Puyallup Glacier begins as a branch off the ice stream that flow out of the Sunset Amphitheater. From the split at around , the glacier expands into a broad sheet of ice ranging from to in elevation. Leaving the large expanse of ice, the glacier flows down a small valley, it narrows significantly as it turns northwestward. From there on, the glacier is dirty and ends on steep, uneven terrain at about . The glacier gives rise to the Puyallup River.