Miller County Sandhills Natural Area, located in the Coastal Plain, is one of the few remaining examples of relatively undisturbed sandhill vegetation in southwestern Arkansas. The area is marked by rolling topography and sandy soils. The dry sandy soils support a distinctive flora, which includes a number of species characteristic of similar sites in eastern Texas. Some of the area is open and supports sandhill grasslands, while the remainder supports wooded and open seeps, pine forest, and oak woodlands characterized by a number of "scrub species." This natural area supports more rare plant species than any other area in the System of Natural Areas. The Nature Conservancy (TNC) shares ownership on a portion of the area and also owns additional land adjacent to the natural area.

From Texarkana travel south on U.S. Highway 71 to State Highway 237. Travel south about 13.6 miles. The natural area is on the west side of State Highway 237. A primitive parking area is located about 0.8 mile south of the junction with State Highway 134 (County Road 434) on the west side of the road.

Specific types of hunting are allowed on this natural area. For details, see the Sandhills Natural Area WMA listing in the current Arkansas Hunting Guidebook. Take all necessary safety precautions when visiting this area.

Arkansas Native Plant Society Makes Big Finds