2016 Map of Keystone Ranch

About this map

Keystone Ranch serves as a central landmark in this portion of Frio County, where the brush country landscape is defined by an intricate network of ephemeral watercourses. Significant drainages like San Miguel Cr and Son Miguel Cr meander through the terrain, eventually meeting in the south. The topography rises toward the Marshall Hills in the southeast, while Howard Lake provides a rare localized water feature in the north. The area is crisscrossed by a grid of rural routes and ranch roads, including FM 1582 and Keystone Rd, which facilitate movement between the expansive livestock operations and agricultural plots that dominate the local economy. The mapping of minor tributaries such as Black Cr, Hackberry Cr, and Live Oak Cr reveals the seasonal hydrology essential for ranching in this Texas environment.