- geologypage.com 2016/05/devils-tower.htmlIn recent years, about 1% of the Monument’s 400,000 annual visitors climbed Devils Tower, mostly using traditional climbing techniques.
- facts.net devils-tower-facts/
- The Devils Tower mostly has hexagonal columns.
- You can climb the Devils Tower without a guide – at your own risk.
- register at the ranger station before and after climbing the Devils Tower.
- a-z-animals.com blog/discover-how-devils-tower-…Devils Tower is an igneous rock butte in Wyoming. It is 867 feet tall from the base to the summit. It rises 1,267 feet above the Belle Fourche River.
- summitpost.org devils-tower/150309Devils Tower is best characterized by its numerous, long crack systems. Free climbing routes, that lead to the Summit, range from 5.6 to 5.12 in difficulty.
- Nestled on 21 private acres of precious prairie and ponderosa pine, Devils Tower Lodge is a one of a kind, rustic experience.
- newworldencyclopedia.org entry/Devils_Tower_…Devils Tower is a monolithic igneous intrusion or volcanic neck located in the Black Hills in northeastern Wyoming (U.S.), above the Belle Fourche River.
- tripadvisor.com Attraction_Review-g60792-d144721-…Depending on where you read about Devils Tower, it was unclear whether or not the Interagency Pass would be accepted for the entrance fee.
- earthtrekkers.com devils-tower/Devils Tower was featured in the 1977 movie Close Encounters of the Third Kind, which turns the tower into an alien landing site.
- atlasobscura.com places/devils-towerLong an inspiration and attraction for nature lovers and mountain climbers, Devils Tower was the first site to be named a National Monument in the United States.
- studiousguy.com Biology Devils Tower Root SystemRain and ice continue to erode the sedimentary rocks surrounding the base of the Devils Tower and over a period more of the Devils Tower will be exposed.