Near Greenwater in Pierce County, Washington — The American West (Northwest)
Mud on the Move
— Mather Memorial Parkway —
These flows carried rock and huge boulders, some 35 feet tall and several hundred feet around, from the mountain’s slopes to the surrounding lowlands.
Osceola Mudflow. The largest of the mountain’s historic flows, the Osceola mudflow covered an area of about 100 square miles. It buried the present town site of Enumclaw (24 miles west of here) under as much as 70 feet of debris.
Seismic activity triggered the mudflow, resulting in the collapse of nearly 2,000 feet of Mt. Rainier’s summit.
Erected by Mt. Baker-Snoqualmie National Forest.
Location. 47° 3.166′ N, 121° 34.325′ W. Marker is near Greenwater, Washington, in Pierce County. Marker is on Chinook Pass Highway (State Highway 410) 7½ miles south of Greenwater, Touch for map. Marker is in this post office area: Enumclaw WA 98022, United States of America. Touch for directions.
Other nearby markers. At least 1 other marker is within walking distance of this marker. Why is the River White? (here, next to this marker).
Categories. • Natural Features •
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Credits. This page was last revised on June 16, 2016. This page originally submitted on June 15, 2015, by J. J. Prats of Powell, Ohio. This page has been viewed 244 times since then and 12 times this year. Photos: 1, 2, 3. submitted on June 15, 2015, by J. J. Prats of Powell, Ohio.