Devils Tower is NOT a Volcano

Devils Tower soars 1,267 feet.

Devils Tower is a laccolithic butte of igneous phonolite porphyry.

Magma intruded into sedimentary rocks about 40.5 million years ago.

Hexagonal columns reach up to 600 feet tall on Devils Tower.

A mistaken translation gave Devils Tower its name in 1875.

Native names include Bear Lodge and Matȟó Thípila by Lakota.

Native stories say giant bears left claw marks on the rock.

Summit of Devils Tower stands 5,112 feet above sea level.

Devils Tower became the first US national monument in 1906.

The monument covers 1,347 acres around Devils Tower’s base.

First climb was in 1893 using wooden peg ladders up the rock.

Climbing is popular but banned voluntarily in June for ceremonies.

Erosion breaks off columns, forming piles of scree at the base.

Devils Tower rises 1,267 feet above the Belle Fourche River.