Devils Tower National Monument

On the morning of Day 5, we headed out to Devils Tower National Monument.  This was the first American National Monument in 1906, and it is 1267 feet high!  The oldest rock was formed 225 to 195 million years ago and there are many theories on how it was formed, which I do not fully understand :)  Some theories say it was an old volcanic rock but that has been disproved recently.  It was very neat, with the trails and red sand.  We weren't allowed to bring Lucy on the trails though, so we didn't hike around too much because she was in the car.  Lots of bikers here too!