Hunt Area 7, South Osage, Wyoming

Rolling to gently undulating plains and asymmetric ridges formed by the westward-dipping homocline of the Black Hills uplift, with long open valleys between low ridges. Elevation ranges from approximately 3,900 to 4,800 feet. The terrain is relatively flat and physically easy to navigate, with no significant mountains or wilderness. Oil field infrastructure is present throughout the area. Creek drainages cut through the grasslands and provide the primary cover breaks.

Primary vehicle access is via US Highway 16 (Newcastle to Upton), Wyoming Highway 450 (south leg of the unit), and Wyoming Highway 116 (Upton south to WY 450). Unpaved county roads and BLM/USFS administrative roads provide access to some interior parcels. Thunder Basin National Grassland (USFS, managed together with Medicine Bow-Routt National Forest) constitutes the largest block of public land in the region. Public land access is rated difficult: land ownership is highly fragmented, with federal, state, and private parcels intermingled in a complex checkerboard pattern. A significant portion of public land is effectively landlocked by private ranch land, requiring hunters to identify legal routes before the season. Four-wheel drive and high clearance are recommended on dirt roads. No designated wilderness or roadless areas exist within this low-elevation grassland unit. The Wyoming Walk-In Area (Access Yes) program may provide some additional access on enrolled private parcels; hunters should confirm current enrollment with WGFD before the season.

Sagebrush-steppe and mixed-grass prairie dominate the uplands, representing the ecological transition zone between Great Plains grasslands to the east and the sagebrush steppe to the west. Scattered ponderosa pine appears on ridges and hillsides on the eastern margins near the Black Hills front. Creek bottoms and drainages support cottonwood and willow riparian corridors that concentrate deer movement. Disturbance from prairie dog colonies, livestock grazing, and oil and gas development shapes vegetation patchiness across the unit.

Mule deer and white-tailed deer both occupy the unit, with mule deer using the open ridges and sagebrush flats and white-tailed deer concentrated in creek drainages, riparian corridors, and brushy draws. Pronghorn antelope are present on the grasslands and are hunted under a separate WGFD antelope hunt area number. Sharp-tailed grouse inhabit the grassland and shrubsteppe. Merriam's wild turkey occur in the broader Weston County area, particularly near riparian corridors and the Black Hills front. Mountain lions are present in northeastern Wyoming and the Black Hills region. Prairie dogs, swift fox, badger, coyote, and jackrabbit are common small mammals.