RAINBOW CLIFFS. The unique geological formations called Rainbow Cliffs, a landmark for centuries, are located four miles south of Marathon, Texas, in central Brewster County. The outcroppings served as protection against Indian attacks and harsh winter winds for nearby Camp Peña Colorado, a United States Army post from 1879 to 1893. The cliffs are composed of the slate from which whetstones are made. The fine-grained sedimentary siliceous rock, without the vegetation that now covers it, produces a rainbow of colors from sunshine. This area of Brewster County became the property of David St. Clair Combs in 1900, when his Combs Cattle Company included the Post Ranch (site of Camp Peña Colorado) and the Rainbow Cliffs. The designation Rainbow Cliffs was used as early as 1879, when Col. B. H. Grierson, who commanded the District of the Pecos from Fort Concho, ordered the establishment of a military post at "Pena Colorado (Rainbow Cliffs) Texas."
Image Use Disclaimer
All copyrighted materials included within the Handbook of Texas Online are in accordance with Title 17 U.S.C. Section 107 related to Copyright and “Fair Use” for Non-Profit educational institutions, which permits the Texas State Historical Association (TSHA), to utilize copyrighted materials to further scholarship, education, and inform the public. The TSHA makes every effort to conform to the principles of fair use and to comply with copyright law.
For more information go to: http://www.law.cornell.edu/uscode/17/107.shtml
If you wish to use copyrighted material from this site for purposes of your own that go beyond fair use, you must obtain permission from the copyright owner.
The following, adapted from the Chicago Manual of Style, 15th edition, is the preferred citation for this article.Handbook of Texas Online, Richard A. Thompson, "Rainbow Cliffs," accessed January 17, 2017, http://www.tshaonline.org/handbook/online/articles/rjr30.
Uploaded on June 15, 2010. Published by the Texas State Historical Association.