2021 Map of Jack Horner Reservoir

About this map

Jack Horner Reservoir and several surrounding irrigation bodies dominate this arid landscape in Wyoming's Big Horn County. The terrain is defined by complex drainage systems and erosion patterns, most notably at Sand Draw in the northwest and Foster Gulch along the northern margin. These features indicate a landscape shaped by intermittent water flow, where smaller catchments like Tommy Tucker Reservoir and North Snyder Reservoir were developed to manage resources in a dry environment. The map also records the larger Snyder Reservoir in the southeast, positioned amidst a network of section lines and township boundaries that divide this open ranching or public land region. This 2021 update preserves the exact spatial relationships of these remote water features, which remain critical landmarks for navigation and land management in the basin today.