Area 100 covers the country south of Thermopolis along the southern Owl Creek Mountains and the Wind River Reservation boundary—a transition zone between the Bighorn Basin and the Wind River country. Elevations run from about 5,000 feet on the basin floor to over 10,000 feet on the higher Owl Creek peaks. The country grades from sage benches and irrigated hay along the Wind River valley, through mountain mahogany and juniper foothills, into Douglas fir and lodgepole pine on the cooler aspects of the higher ridges, with aspen pockets in the wetter folds. Crowheart Butte is the recognizable landmark on the east—a flat-topped sandstone butte named for a 19th-century battle between Shoshone and Crow. The Wind River Reservation forms the dominant boundary; tribal permits are required for reservation hunting and are issued sparingly to non-tribal hunters. BLM, state, and Shoshone NF fill in the off-reservation country. US-26 frames the access through the Wind River valley; county roads thread the foothills. Crowheart and Ethete are reservation communities with limited services; Lander and Thermopolis are the supply towns. Cell service drops past Lander. Mule deer in the foothill mahogany and aspen, antelope on the sage benches, elk in the higher timber. Reservation boundary discipline is critical—do not cross without authorization. Area 100 around Casper Mountain is the most urban-adjacent elk and deer unit in Wyoming, and the proximity to Casper (population 60,000) means heavy local pressure that defines the hunting experience. Nonresident elk tags require 2-4 preference points; deer tags 1-2 points. No wilderness designations apply, and no grizzly bears are present. Land is a patchwork of BLM, USFS (Medicine Bow NF), state trust, Natrona County parks, and private ranch — study the ownership maps carefully because boundaries are complex. The area is known for convenience over quality — you can hunt elk within 20 minutes of a Walmart, which is unique in Wyoming but means every local hunter with a tag is in the field on opening weekend. Hunters who focus on the southern foothills and draws away from Casper Mountain proper find lower pressure. Mule deer in the sage breaks are the more productive species, and the south-side BLM draws hold bucks that avoid the mountain-top crowds.