Unit 40A

Key reference features include Wessington Hills, a subtle but navigable high point visible from much of the unit. Multiple lakes—Long Lake, Cottonwood Lake, Hoagland Lake, Grass Lake, and others—serve as navigation anchors and water sources. Sayles Creek and East Fork Smith Creek provide drainage corridors that break up the flat terrain and concentrate wildlife movement.

Tower Reach represents a historical landmark useful for orientation. These widely spaced features mean navigation relies heavily on maps and GPS rather than dramatic terrain recognition.

The entire unit sits in the lower elevation band with minimal relief—gentle prairie grass with scattered wetlands and shallow lake basins defining the landscape. Vegetation consists primarily of native and cultivated grassland with minimal tree cover except in drainage corridors and around historical homesteads. The terrain transitions subtly between slightly elevated prairie ridges and shallow valleys where water collects seasonally.

This is open country where treelines are rare and sightlines extend for considerable distances, creating visibility patterns that reward early mornings and evening hunting.

The well-developed road network (2.16 miles per square mile) makes the unit highly accessible by vehicle, enabling quick coverage but limiting solitude. The 98.8% private land ownership is the controlling factor—most road access crosses private property. Logical staging areas exist near Wessington Springs, Alpena, and Spring Valley Colony.

Success here depends almost entirely on securing landowner permission well in advance. The straightforward terrain and connected roads mean little terrain-based escape from pressure; instead, refuge comes from being on cooperative private land.

Unit 40A occupies roughly 530 square miles of central South Dakota prairie, encompassing the country around Wessington Springs, Alpena, and Lane. The terrain is purely plains grassland with no significant elevation changes—a characteristically flat landscape broken only by drainage bottoms and scattered water impoundments. Bordering communities provide reference points for navigation and supply, though hunters should understand this is working agricultural country with limited public access.

The unit represents typical northern Great Plains habitat where private land dominance requires advance planning and landowner cooperation.

Water availability is moderate but concentrated. Named lakes including Long, Cottonwood, Hoagland, Grass, Crow, Deans, and Bakers provide permanent or semi-permanent impoundments that attract wildlife. Sayles Creek and East Fork Smith Creek function as reliable drainage systems with seasonal flow.

Cady Lake and Rempfer Lake add to available water points. The flatness means water doesn't follow dramatic canyon systems but instead collects in basins and backwater areas. Early season scouts should locate which water sources are holding livestock or wildlife.

This unit supports both mule deer and whitetail populations in grassland habitat. Mule deer utilize the open prairie and creek bottom sagebrush where available, while whitetails concentrate near water and in scattered woody cover. Without public land access, focus hunting strategy on establishing relationships with landowners before season.

Early season hunting targets animals using open grazing areas and water sources at dusk and dawn. Late season movement concentrates near remaining water and thermal cover in drainage bottoms. The flat terrain rewards glassing from elevated prairie ridges and hunting creek systems where vegetation provides cover and water draws animals consistently.