Unit 117 sits in the absolute far southeast corner of Colorado—southern Baca County country reaching to the Oklahoma and New Mexico three-corners point near the town of Campo. Elevations 3,800 to 4,800 feet. The terrain is shortgrass and sandsage prairie with the Cimarron River drainage cutting juniper-and-cottonwood breaks across the south end of the unit. Black Mesa, the highest point in Oklahoma, rises just across the line and you can see it from much of the unit—volcanic-capped mesa country that defines the regional geology. Mule deer hold the Cimarron breaks and juniper benches in real numbers; pronghorn cover the open uplands; turkey work the cottonwood riparian. Some of the largest mule deer in the southeast plains come out of these canyons becuase the country is genuinely remote and pressure stays embarrassingly low. The Comanche Grassland's Carrizo Unit covers a meaningful slice of the unit—public USFS-managed grassland, juniper benches, and rim country with FS-road access off US-287 and county routes. The rest is deeded private ranchland with some legacy Spanish-grant boundaries on the south. US-287 cuts north-south through Springfield and Campo; county roads grid the rest. Springfield is the supply town for this whole quadrant—gas, food, motels, the Grassland ranger station. Campo has a gas station and a school. Cell service is genuinely poor across most of the unit and gone entirely in the canyon country—plan for satellite communication. The wind is constant; the dirt roads turn to a slick paste when wet that will pin a 4WD in the wrong rut. Pronghorn rifle in October and mule deer in the canyon country are both quietly excellent here for hunters who do the homework.