Devils Tower, a mass of bare rock that rises abruptly from the
surrounding grasslands and pine forests, is one of the most conspicuous
geologic features of the Black Hills region. Because of its scenic
beauty and scientific interest, President Theodore Roosevelt in 1906
established Devils Tower and a small surrounding area as the first
National Monument.
The Devils Tower National Monument covers an area of about 2 square
miles near the center of Crook County in northeastern Wyoming (fig. 52).
A paved road from the entrance of the National Monument goes south 7
miles to join U. S. Highway 14 at a point 29 miles northwest of
Sundance, Wyo., and 33 miles northeast of Moorcroft, Wyo. The entrance
to the National Monument may also be reached by a road (paved in
Wyoming) that goes northeastward from the entrance, via Hulett and
Aladdin, Wyo., to Belle Fourche, S. Dak., a distance of about 54 miles,
where it joins U. S. Highways 212 and 85.
[Illustration: Figure 52.—Index map showing location of Devils Tower
National Monument.]
Public campgrounds and a natural history museum are maintained by the
National Park Service at the base of the Tower about 3 miles by paved
road from the Monument entrance.
The geology of the Devils Tower National Monument was mapped during the
summer of 1954 by the U. S. Geological Survey in collaboration with the
National Park Service. The work was part of a study of the geology of
the northern and western parts of the Black Hills region conducted by
the Survey on behalf of the Division of Raw Materials of the U. S.
Atomic Energy Commission. The author wishes to acknowledge the
assistance of the National Park Service and, in particular, Mr. Raymond
McIntyre, Superintendent of Devils Tower National Monument.