2016 Map of Holcomb Reservoir

About this map

Pilot Knob and the English Hills command the topography of this corner of Frio County, where the landscape is defined by an intricate network of drainage and water management. The namesake Holcomb Reservoir sits in the northwest, feeding into a system of seasonal watercourses including Elm Cr and Jack Cr. The prevalence of named stock tanks, such as Willow Tank, Garden Tank, and English Hills Tank, reflects the region's ranching heritage and the vital importance of water storage in this semi-arid South Texas environment. Ranch roads and state routes like W FM 140 weave between these landmarks, while the Frio River makes a brief appearance in the northeast. This 2016 survey illustrates how the natural topography of ridges and hollows, including Goat Hollow Cr and Live Oak Cr, has been adapted for agricultural use through the placement of these numerous tanks and catchments.