This unit is located in the Northcentral portion of the state running along the North Dakota border. The eastern border is the Missouri River with the most notable terrain feature of the unit being the Grand River that runs from west to east across the entire unit. The bulk of the property in the unit is owned by the Standing Rock Reservation and has little agriculture throughout. There are countless creek bottoms scattered across the unit but overall the elevation change is very mellow. Overall this unit has excellent habitat throughout and has a healthy population of antelope.

The bulk of this unit is made up of the Standing Rock Reservation, with the exception of one decent sized piece of Grand River National Grassland in the southwest corner unit is primarily private land. GOHUNT maps are highly recommended to help navigate public and private boundaires.

This northern unit has some vast areas that are relatively flat with little contour throughout. The Grand River is the most significant terrain feature in the unit spanning the entire unit from west to east eventually spilling into Lake Oahe across from the town of Mobridge. The entire unit has approximately a thousand feet of elevation change but is almost always very gradual. There are a number of small creek beds throughout that make for excellent habitat for the unit's wildlife.

A mix of short and tall prairie grass for miles in all directions as well as countless species of wildflowers can be found in most areas of the unit that haven’t been turned for agricultural purposes. Very sparse timber which is primarily a mix of Cottonwood, American Elm, Green Ash, and Bur Oak can be found along the riparian zone of Grand River.

Given the sheer size of this unit there are a number of state highways throughout the unit. The most notable being highway Unit 12 that runs across the northern border for roughly 40 miles until it turns southeast as it heads toward Lake Oahe in the southeast corner of the unit. Highway 63 and 65 can be found running north and south in the more central portions of the unit eventually continuing into North Dakota. Any of these routes have countless county roads as well as less established roads in all directions.

Lodging, camping and other amenities are a scarcity in this unit. Overall there are very little of anything located in the unit. Any of what can be found will be located around the borders of the unit and are scarce even then. If planning on hunting this unit, especially when planning a DIY hunt of any kind plan on getting what you need prior to heading into the field as there is likely to be low availability of most things near where you are headed.