Unit 56A
Flat prairie grassland with scattered water features and extensive road access throughout.
Hunter's Brief
Unit 56A is open prairie country typical of South Dakota's central plains—low, rolling grassland with minimal timber. Nearly all of the unit is private land, but a dense road network provides access to hunt from public roads and with landowner permission. Water comes from scattered lakes and creek drainages including McCoy Lake, Twin Lakes, and Redstone Creek, which concentrate deer movement. Straightforward terrain makes navigation simple, though success depends heavily on access arrangements with local ranchers.
- Compact: under 200 sq mi
- Moderate: 200 - 800 sq mi
- Vast: over 800 sq mi
- Few: under 25%
- Some: 25 - 60%
- Most: over 60%
- Limited: under 0.7 mi/mi² (backcountry)
- Fair: 0.7 - 1.5 mi/mi²
- Connected: over 1.5 mi/mi² (well-roaded)
- Flat: under 20% mountains
- Rolling: 20 - 55%
- Steep: over 55%
- Sparse: under 20%
- Moderate: 20 - 50%
- Dense: over 50%
- Limited: under 0.3% area
- Moderate: 0.3 - 2% area
- Abundant: over 2% area
Terrain Deep Dive
Landmarks & Navigation
Key water features anchor hunting strategy: McCoy Lake, Twin Lakes, and Letcher Lake provide reliable water draws for deer movement. Redstone Creek and West Redstone Creek flow through the unit offering additional water and riparian cover. Big Mound provides the only notable topographic feature—a subtle rise useful for glassing the surrounding prairie.
County ditches including Number 14, Number 8, and Number 7 channelize water through the landscape and may concentrate deer. These drainages and water points serve as primary navigation aids in country where landmarks are subtle; they're the natural focus for hunting pressure.
Elevation & Habitat
The entire unit sits in the lower prairie zone with elevations ranging only 200 feet from lowest to highest. Habitat is overwhelmingly open grassland and prairie with scattered agricultural fields—trees are rare except in stream bottoms and shelterbelts. Ferguson Grove and scattered cottonwood draws along creeks provide the only significant woody cover.
This is classic Great Plains terrain where visibility extends across vast grassland expanses. Vegetation transitions are minimal with elevation, making the unit remarkably consistent: prairie grass, native ranching land, and cultivated fields dominating from boundary to boundary.
Access & Pressure
The unit boasts dense road connectivity with 2.44 miles of road per square mile—well-developed county roads crisscross the prairie. Highway access includes US routes serving the region; towns sit immediately adjacent to the unit. This connectivity means easy vehicle access and good pressure management opportunity: most hunters will use roads to reach water features quickly, so hunters willing to walk away from roads find less competition.
Private land dominance means access depends entirely on landowner relationships; public road hunting is possible but limited. The flat terrain and road network make scouting efficient and straightforward.
Boundaries & Context
Unit 56A encompasses approximately 570 square miles of South Dakota's central plains east of the Missouri River breaks. The unit sprawls across low-elevation prairie with minimal topographic relief—elevations stay well below 1,400 feet throughout. This is productive agricultural and ranching country where public land comprises less than one percent; hunting virtually requires private land access.
The unit's straightforward geography makes it suitable for hunters comfortable with prairie conditions and landowner negotiations. Towns including Woonsocket, Forestburg, and Letcher provide services and staging points for accessing the unit.
Water & Drainages
Water moderately distributed across the prairie creates deer movement corridors. McCoy Lake, Twin Lakes, School Section Lakes, Letcher Lake, and Long Lake provide permanent water sources in this semi-arid prairie environment. Redstone Creek and West Redstone Creek flow through the unit with reliable flow in wetter seasons.
Sand Creek, Dry Run, and Jim Creek offer seasonal water and riparian cover. Rifle Lake adds another water point. During dry periods, these water features concentrate deer; early and late season hunting often centers on morning and evening water movements.
Hunters should verify seasonal water availability with local ranchers.
Hunting Strategy
Unit 56A supports white-tailed and mule deer in prairie grassland habitat. White-tails concentrate in riparian cover along creeks and around scattered timber; early morning and evening hunts near cottonwood draws and creek bottoms prove productive. Mule deer favor the open grassland but use water features and timber edges.
Both species exhibit classic prairie behavior: feeding in grassland at dawn and dusk, bedding in brush and draws during daylight. Hunting strategy centers on accessing water features and riparian corridors with landowner permission, then glassing surrounding prairie for movement. The flat terrain offers long-distance visibility; binoculars are essential for spotting deer at distance.
Late season often concentrates deer near reliable water.