Unit 64A

Scattered buttes provide orientation points across an otherwise uniform grassland: Thunder Butte, Eagle Butte, Joshua Butte, and Mud Butte are recognizable landmarks for navigation and spotting. Valleys and draws—Jackson Draw, Clayton Draw, Eagle Chasing Draw—form the natural travel corridors and water collection points where creeks and springs emerge. Lake Buffalo and several reservoirs (Herren Dam, Oliver Dam, Sandoz Dam, Miller Dam) mark reliable water and potential staging areas.

Small populated places like Dupree, Bridger, and Chase serve as resupply and information points. The relatively flat terrain means landmarks, water sources, and creek drainages become critical reference points for hunters moving across expansive grassland.

The entire unit sits below 3,000 feet, a uniform low-elevation prairie landscape with virtually no forest canopy. Grasslands dominate, covering nearly 99% of the terrain as mixed-grass prairie typical of the northern Great Plains. Elevation bands are subtle—gradually rising from creek bottoms and draws toward low-lying buttes and ridgetops that rarely exceed 2,700 feet.

Vegetation is sparse in timber but thick in native grass and sage; the few wooded areas cluster in sheltered draws and around spring heads. This is open country designed for long-distance glassing and pronghorn that thrive in visibility.

Access is the defining challenge of 64A. With 98.8% private ownership and only 0.6 miles of road per square mile, this is hunters-by-permission country. The sparse road network means public travel is limited; reaching the unit requires locating landowner access or finding small public tracts. Road density suggests minimal infrastructure—hunters won't find developed trailheads or maintained access corridors.

The vast size and low hunter density mean pressure is historically low, but access barriers keep the unit from being hunted heavily. Success depends on pre-season scouting, landowner relationships, and willingness to hike open prairie.

Unit 64A occupies roughly 2,000 square miles of northwestern South Dakota's high plains between the Missouri River drainage and the North Dakota border. The unit centers on communities like Dupree and Bridger, anchoring a region of unbroken grassland broken only by low buttes and prairie drainages. Nearly all land is privately owned, making access the primary challenge.

The terrain is regionally contiguous—part of the broader prairie ecosystem that stretches across multiple states. Hunters approaching 64A should plan to work with landowners or identify state/public access points well in advance.

Water availability is moderate but scattered. Little Turtle Creek, Mud Creek, North Felix Creek, Deer Creek, and Red Scaffold Creek are the major drainages, flowing through broader valleys that hold moisture longer into summer. Numerous springs—Hold Spring, Circle P Springs, Jackson Spring, Black Bull Spring—provide reliable water sources where hunters scout carefully.

Stock dams and reservoirs (at least ten marked across the unit) supply water for livestock and concentrated wildlife use. Water sources cluster in specific drainages rather than throughout the unit, making knowledge of spring locations and creek flows essential for both access and predicting animal movement patterns.

64A is pronghorn-focused terrain where the open grassland and rolling buttes create ideal conditions for spot-and-stalk hunting. Pronghorn thrive in this sparse prairie habitat with excellent visibility to escape predators. Early season (fall) finds animals using higher ground and ridge systems; water sources become critical as temperatures rise.

Hunt buttes and high points for glassing; the low terrain complexity makes it straightforward to access vantage points. Creeks and springs concentrate animals, particularly during heat or dry periods. Success requires patience and optics—scout thoroughly from distance, identify bedding draws, plan stalks that use the subtle terrain to approach without being skylined.

The open nature rewards methodical hunters who accept the slow pace of prairie pronghorn hunting.