Unit 45B

Open prairie grasslands with scattered reservoirs and minimal timber across central South Dakota.

Hunter's Brief

Unit 45B is classic Great Plains country—rolling grassland broken by shallow draws and dotted with stock ponds and reservoirs. Elevation stays consistently low across the unit, creating open sightlines ideal for pronghorn hunting. A fair network of county and ranch roads provides access, though roughly half the land is private, requiring landowner permission or reliance on public areas. Water is present but scattered; most comes from reservoirs rather than perennial streams. The terrain is straightforward and relatively undemanding, with manageable pressure potential due to the shared public-private landscape.

?
Terrain Complexity
2
2/10
?
Unit Area
376 mi²
Moderate
?
Public Land
49%
Some
?
Access
1.0 mi/mi²
Fair
?
Topography
0% mountains
Flat
?
Forest
Sparse
?
Water
0.3% area
Moderate

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Terrain Deep Dive

Landmarks & Navigation

Stony Butte provides the primary terrain landmark, offering a slightly elevated vantage for glassing or orientation. Multiple reservoirs punctuate the grassland—Nels, Williams 783, Sheriff, Kennedy Number One, Engen, Summit, and Richland reservoirs all provide water reference points and potential camping or access staging areas. South Branch Cedar Creek is the named drainage corridor, though seasonal flow should be anticipated.

These scattered water features serve as practical navigation aids and hunting focal points rather than dramatic terrain anchors.

Elevation & Habitat

All terrain in 45B falls below 5,000 feet, with elevations ranging from roughly 1,500 to 2,200 feet across a relatively compressed range. The landscape is dominated by short-grass prairie and grassland, with virtually no forest cover—this is open country from edge to edge. Native grasses and sage-grass combinations provide pronghorn forage throughout.

The lack of significant elevation change means habitat character remains consistent across the unit, though subtle drainage areas and draws offer topographic variation in an otherwise rolling plainscape.

Elevation Range (ft)?
1,4732,241
01,0002,0003,000
Median: 1,877 ft
Elevation Bands
Below 5,000 ft
100%

Access & Pressure

Unit 45B has a fair road network with roughly one mile of road per square mile—mostly county roads and ranch access routes rather than highways. The 91 miles of major roads and 58 miles of highway access mean reasonable entry points exist around the unit's perimeter and interior. However, 50.7% private land creates access constraints; hunters must secure permission or hunt public sections strategically.

The combination of fair accessibility and split ownership means pressure concentrates on known public areas, while exploring private-land relationships can reduce competition significantly.

Boundaries & Context

Unit 45B occupies a 376-square-mile block of central South Dakota prairie, sitting entirely below 2,300 feet elevation. The landscape is uniform in character—flat to gently rolling grassland with no significant timbered areas or mountain complexes. Nearly 50% of the unit is public land interspersed with private ranches, creating a checkerboard access pattern typical of the northern Great Plains.

The unit's straightforward topography and manageable size make navigation relatively simple compared to more complex terrain.

Land Cover Breakdown?
Mountains (open)
0%
Plains (open)
100%
Water
0%

Water & Drainages

Water is present but concentrated in man-made structures rather than flowing streams. Eight named reservoirs are distributed across the unit, offering reliable stock water for livestock and wildlife. South Branch Cedar Creek is the primary natural drainage, though reliable perennial flow varies seasonally.

The moderate water availability is adequate for hunting operations, but water location should be confirmed before planning hunts in remote sections. Most hunting camps will rely on reservoir access or pre-scouted stock tanks rather than flowing creeks.

Hunting Strategy

Unit 45B is pronghorn country, plain and simple. The open grassland habitat and low elevation create ideal conditions for pronghorn in their core native range. Hunting approach should emphasize glassing—the flat terrain with minimal visual obstruction rewards binocular work and long-range spotting from elevated points like Stony Butte.

Early and late season offer best conditions; summer heat and fall rut timing are traditional. The scattered reservoir system provides both water-hole hunting opportunity and practical logistics support. Success depends on combining traditional stalk hunting with persistence scouting the public-land patches and negotiating private access where possible.