On the third day, Herb and I hiked the 5 mile trail taking us to Devil's Post Pile National Monument and down the San Joaquin River to Rainbow Falls and Lower Falls
Entering Devil's Post Pile
A jumble of multi-faceted rocks lying at the base of slender post-pile columns. The post-piles were created by slowly cooling lava.
You can see the tops of the columns by taking the High Trail. Moving glaciers more than 12,000 years ago scraped off the tops of the piles and polished them into a stone patio-like surface.
Over the eons, glaciers and the San Joaquin River polishes the boulders as the river flows toward Rainbow Falls.