The Trans-Pecos, as originally defined in 1887 by the Texas geologist Robert T. Hill, is the distinct portion of Texas that lies west of the Pecos River...

of the Pecos River is often called "Far West Texas" or the "Trans-Pecos", a term introduced in 1887 by geologist Robert T. Hill. The Trans-Pecos lies within...

in the valley on the west bank of the Pecos River at the eastern edge of the Chihuahuan Desert, in the Trans-Pecos region of West Texas and just south of...

The Trans-Pecos rat snake or Davis Mountain rat snake (Bogertophis subocularis), is a species of medium to large, nonvenomous rat snake in the family...

organized in 1875. It is named for the Pecos River. It is one of the nine counties that comprise the Trans-Pecos region of West Texas. Archeological digs...

several regions with distinctly different climates: Northern Plains, Trans-Pecos Region, Texas Hill Country, Piney Woods, and South Texas. Generally speaking...

The Trans-Pecos Volcanic Field is a volcanic field located in western Texas in the counties of Brewster, Jeff Davis, Presidio, and extends into northern...

Trans-Pecos copperhead, western copperhead Agkistrodon contortrix pictigaster was formerly a venomous pit viper subspecies found in the Trans-Pecos region...

Missouri Trans-Pecos copperhead Agkistrodon contortrix pictigaster Gloyd & Conant, 1943 Broad-banded copperhead Agkistrodon laticinctus The Trans-Pecos region...

Texas, west of the Pecos River, beginning with the Davis Mountains on the east and the Rio Grande to its west and south. The Trans-Pecos region is the only...