The Osceola Mudflow, also known as the Osceola Lahar, was a debris flow and lahar in the U.S. state of Washington that descended from the summit and northeast slope of Mount Rainier, a volcano in the
Mount Rainier with its main summit, Columbia Crest (14410 feet) at the center. Emmons Glacier covers most of the visible flank of the mountain with Disappointment Cleaver visible below Gibraltar Rock, right of the sharp pointed Little Tahoma (11138 feet). Liberty Cap (14112 feet) is visible on the right center skyline behind Russell Cliff.