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Yellowstone National Park - Mt. Everts Mudslides

Location of sign - roadside in Yellowstone National Park

Photo taken June 2008

Close-up view of sign

Wide view of sign

Text of sign:

Mt. Everts Mudslides

Temporary Scenery

Landscapes are epidemic in this valley.  In late spring and summer storm clouds travel through Gardiner River canyon, striking 

Mt. Everts with brief but intense showers.  The dry, layered cliffs have little protective vegetation.  Loosened by seismic tremors,

and constant freezing and thawing, tons of mud and rock wash downslope, forming alluvial fans at the base.

Down valley towards Gardiner, the slumping is more severe.  After a heavy rain, cliffs of shale, mudstone and sandstone turn to 

liquid mud and half the mountain seems to come pouring down, sometimes blocking traffic.  Boulders, uprooted trees ride great

distances.  Look for landslide evidence on either side of the road.

Graphics on the sign

In addition to the text there are pictures of equipment cleaning up the mudslides.

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