The community of Mills lies within the western unit of the Kiowa National Grassland. Clayton is the nearest town to the eastern unit of the Grassland.
Description
Both units of the National Grassland consist of a patchwork quilt of public land interspaced with private land. Elevations on the Grassland range from which is high enough to moderate somewhat the summer temperatures of the Great Plains. The average high and low temperatures for Clayton in July are and and January highs and lows are and. Annual precipitation is about throughout the Grassland with July and August the wettest months and January and February the driest. Semi-arid steppe grassland is the most common vegetation, covering 79 percent of the Grassland. Ten percent of the land is covered with Pinyon – Juniper woodland, almost entirely in the western sector. A few stands of Ponderosa Pine are found in the Canadian River Canyon in the western sector. Nine percent of vegetative cover is Sand Sagebrush and one percent is Cottonwood and Willowriparian forest. The Canadian River is the only permanent stream. Playa lakes are commonly found. has been proposed as a Wilderness Area. Nearly all of the land in the Kiowa National Grassland is leased to ranchers for grazing cattle which is the main economic activity in the region.
Recreation
Eastern Unit
Twenty-two miles northeast of Clayton is McNees Crossing, a reliable source of water on the Santa Fe Trail. In 1828, two young traders, Robert McNees and Daniel Munro, were killed here by Native Americans. In 1831, the first celebration in New Mexico of Independence Day took place at McNees Crossing. Although on private property, a short trail leads to the crossing of Corrumpa Creek and a historical marker. Seventeen miles north of Clayton is a three-mile section of the Santa Fe Trail which is open for walking and horseback riding. The trail is marked by rock posts. The ruts of wagons that passed this way in the nineteenth century are still present.
Western Unit
The rim of the Canadian River Canyon, also called Mills Canyon, is six miles west of the nearly-deserted community of Mills. About of the red-rock, well-vegetated canyon are in the National Grassland. The canyon is deep and more than wide from rim to rim. A primitive campground is on the rim. A road down into the canyon is traversable by foot, horseback, or high-clearance vehicles. On the canyon floor are the ruins of the homestead of Melvin Mills who had an apple orchard and a home here in the early 1900s. The area is rich in wildlife including introduced Barbary Sheep which flourish among the cliffs. The Canadian River has a variety of sport fishes including Largemouth Bass and Channel Catfish. A wilderness area encompassing was proposed in 2008 for the Cimarron River Canyon. The proposal would preserve the pristine state of about eight miles of the canyon. Fishing, hunting, and non-motorized travel would be permitted in the wilderness area.