2020 Map of Big Horse Basin Gap

About this map

Big Horse Basin Gap and its neighbor, Little Horse Basin Gap, form critical topographic breaks in the high desert landscape of Owyhee County. This 2020 survey illustrates a complex network of seasonal drainage and steep rimrock terrain, where Horse Basin sits as a prominent natural depression. The hydrology of the region is defined by the deep incisions of Big Jacks Cr and Little Jacks Cr, which carve through the volcanic plateau. These watercourses, along with Rattlesnake Cr, dictate the movement of both wildlife and land use in a territory largely defined by the Public Land Survey System. The map provides a precise view of the section lines and township boundaries, including t8s r3e and t9s r4e, which are essential for property research and understanding the historical administration of this arid backcountry.