Unit 35A

The South and North Cave Hills form the most recognizable terrain features and serve as both navigation anchors and glassing platforms. Battle Ridge, Red Butte, and Harding Peak provide elevation to glass from. The Jumpoff and Castle Rock mark distinct geographic references in otherwise subtle terrain.

Drainages like Smith Draw, Sheep Draw, and Big Dam Draw channel both water and hunter movement through the prairie. These draws become critical corridors during dry periods. Springs and small reservoirs—Riley Spring, Craig Pass Spring, Leger Dam, Davis Reservoir—are scattered across the unit and marked on maps; locating them is essential preparation.

Elevations stay below 4,100 feet across the entire unit, with the majority of country sitting in the 3,000-foot range. The terrain is predominantly open prairie—short grass and sage plains with minimal tree cover except in scattered draws and along ridges. The Cave Hills rise as modest buttes breaking the horizon, featuring exposed rock faces and sparse ponderosa pines on their north slopes.

Habitat transitions from low prairie swales to slightly more rugged terrain in the butte country, but the overall impression remains open, expansive grassland. This is pronghorn habitat at its core—visibility for miles in most directions.

The sparse road network (0.48 density) means most country requires permission or ranch routes to access. Roughly 78 percent is private, severely limiting hunter mobility. The few public parcels and accessible ranch lands draw pressure, particularly around known water sources and the Cave Hills.

Limited road access translates to lighter pressure than more connected units, but also means most hunters are concentrated on accessible stretches. Early scouting and landowner relationships are critical. The straightforward terrain tempts road-hunting and glassing from ranch roads; considering unconventional access and foot-traffic across private land could pay dividends with permission.

Unit 35A covers roughly 1,347 square miles of northwestern South Dakota's high plains, anchored by the Cave Hills range and surrounding prairie. The unit encompasses small communities including Camp Crook, Harding, and Buffalo, which serve as logical staging areas. The landscape transitions from the pine-studded ridges of the Cave Hills down to rolling prairie grasslands.

Access is primarily via secondary roads and ranch routes; major highways like US-212 skirt the unit's periphery but don't cut through it. This is working ranch country with significant private ownership dominating the landscape.

Water is the limiting factor across 35A. The unit depends on a scattered network of springs, small reservoirs, and seasonal water holes. Named springs include Riley Spring, Craig Pass Spring, and Buffalo Springs; small reservoirs like Leger Dam, Davis Reservoir, and Cundy Reservoir hold water through the season. Smith Creek, Smiley Creek, and other named streams are primarily seasonal drainages.

Most years, water becomes critically scarce by late summer, concentrating pronghorn around reliable sources. Success hinges on identifying which water sources hold up and how pronghorn use terrain relative to them.

This is pronghorn country first and foremost. The vast, open prairie and modest elevation gains make it ideal glassing habitat—spot-and-stalk becomes the primary method. Early season means water sources are more abundant and pronghorn more dispersed; focus on butte country for visibility.

As summer progresses and water dries, pronghorn concentrate around reliable springs and reservoirs—these become predictable hunting locations. The Cave Hills and surrounding buttes provide glassing vantage; plan to glass from dawn through mid-morning when visibility is best. Wind matters significantly in this open country.

Expect to cover ground; bring good optics, water, and patience. Late season pressure may push pronghorn into the private draws and ridges where access is restricted.