ARROYO CALERO. Arroyo Calero begins a quarter mile north of Interstate Highway 10 and two miles south of the Malone Mountains in southwestern Hudspeth County (at 31°12' N, 105°35' W) and runs southwest for seven miles to its mouth on Fort Quitman Lake, four miles southeast of Esperanza and one mile north of the Rio Grande (at 31°08' N, 105°39' W). It traverses steeply to gently sloping terrain surfaced by variable soils that support scrub brush and sparse grasses. Calero, Spanish for "calcareous," presumably refers to the limestone found in the area.
The following, adapted from the Chicago Manual of Style, 15th edition, is the preferred citation for this article."ARROYO CALERO," Handbook of Texas Online (http://www.tshaonline.org/handbook/online/articles/rba94), accessed May 24, 2013. Published by the Texas State Historical Association.