From Oregon we went to Bruneau Dunes State Park, south of Mountain Home Idaho. There are sand dunes here next to two lakes. Here is why: Bruneau Dunes started to form 11,000 years ago after the tremendous Bonneville Flood. BD is the tallest single sand dune structure in North America. Ideal conditions existed here for sand dune formation. 1) a circular basin carved by the Snake River which forms a natural trap to cat h wind born sand 2) a supply of sand coming from ancient sediment laid down in the Snake River plateau 3) a wind blowing at least 10 miles per hour to transport the sand. The dune is created and maintained by long term wind patterns. The wind comes from two prevailing directions approximately 180 degrees apart. The opposing winds keep the dunes in place.
We climbed up the dunes and walked along the top of one of them. It was so much fun
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