Wood River Magic Rocks

Tom, Erik and I recently went on an exploratory trip to the Wood River about 10 miles above the town of Shoshone Idaho.  This area is a sheet of basalt covered by a little dirt and sagebrush.  The Wood River that drains Magic Reservoir flows over this land, and has cut a gorge about 20 feet deep into the solid basalt.  In some places its 15' wide, sometimes its 2 feet wide.  In the narrow spots there are often huge chock stones as big as a car that are jammed into the slot.