From Devils Tower NM we headed further northwest toward the Battle of Little Bighorn National Monument (http://www.nps.gov/libi/) in southeast Montana - a roughly four hour drive from Devils Tower. We really did not do justice the historical site. I recommend taking the historical tour with the Indian and Park Service guides. We still had a two hour drive to our destination tonight in Red Lodge, MT so we did the self-guided tour and moved on. It is still fascinating the history on that spot.
