deer hunting unit · South Dakota Game, Fish and Parks
West River deer unit WRD-20A (Corson County)
South Dakota, United States
The map opens on this unit. Turn on Hunting units in Layers to see its boundary with public land, your pins and the forecast.
About West River deer unit WRD-20A (Corson County)
West River deer unit WRD-20A (Corson County) is a deer hunting unit in South Dakota, United States, set by South Dakota Game, Fish and Parks. It covers about 6,552 km² (2,530 mi²). No town of the HuntGrid list lies inside it; the nearest is Mobridge, about 3.5 km from its edge.
HuntGrid draws its boundary from South Dakota Game, Fish and Parks's data for the 2026 season. The agency uses this unit system for White-tailed deer and Mule deer.
- Unit code
- 20A
- Area
- 6,552 km²
- Area (miles)
- 2,530 mi²
- Boundaries
- 2026
Public and protected land mapped inside it
HuntGrid's public land layers map about 432 km² of public or protected land inside it, 7% of the unit. Some protected land is privately owned (a conservation group's, for one). By manager, as the source names it:
| Manager | km² | Share |
|---|---|---|
| Omaha | 200 | 3% |
| Forest Service Region 01 Northern | 125 | 2% |
| Unknown | 107 | 2% |
Boundaries are approximate and aren't legal descriptions. Public land doesn't always mean you can hunt there: check your local regulations and posted signs.
Public land: U.S. Geological Survey (USGS) Gap Analysis Project (GAP), 2025, Protected Areas Database of the United States (PAD-US) 4.1
Seasons and regulations
Seasons for this unit that a person has checked against South Dakota Game, Fish and Parks's regulations:
| Species | Dates | Details |
|---|---|---|
| White-tailed deer | Sep 1, 2026 to Jan 1, 2027 | antlerless, archery, residents source |
| White-tailed deer | Oct 1, 2026 to Jan 1, 2027 | antlerless, archery, non-residents source |
| Mule deer | Nov 14, 2026 to Nov 29, 2026 | antlerless, firearm, draw source |
| Mule deer | Nov 14, 2026 to Nov 29, 2026 | firearm, draw source |
| White-tailed deer | Nov 14, 2026 to Nov 29, 2026 | firearm, draw source |
| White-tailed deer | Nov 14, 2026 to Nov 29, 2026 | firearm, draw source |
| White-tailed deer | Nov 14, 2026 to Nov 29, 2026 | antlerless, firearm, draw source |
| White-tailed deer | Dec 1, 2026 to Jan 1, 2027 | antlerless, muzzleloader source |
| Mule deer | Dec 12, 2026 to Dec 20, 2026 | antlerless, firearm, draw source |
| White-tailed deer | Dec 12, 2026 to Dec 20, 2026 | antlerless, firearm, draw source |
The official regulations have the final word: check them before you hunt.
Units around it
Next to it in the same unit system
Other hunting units that cover part of it
- Prairie turkey unit 20A (Corson) (turkey hunting unit)
- Antelope unit PRA-20A (Corson) (antelope hunting unit)
- High Plains Mallard Management Unit (duck zone)
- Nonresident waterfowl unit NRW-00B
- Nonresident 3-day waterfowl unit NRW-00Z (private land only) (nonresident waterfowl unit)
- Sandhill crane open unit (sandhill crane unit)
- Prairie (outside the Fire Protection District) (mountain lion zone)
- Archery and muzzleloader deer unit ST1 (statewide except Custer State Park)
- Dark goose Unit 1 (goose hunting unit)
- Archery deer unit WR1 (West River) (archery and muzzleloader deer unit)
- Prairie elk unit WRA (West River) (elk hunting unit)
- West River zone (west of the Missouri River, outside the Black Hills Fire Protection District) (bobcat zone)
What HuntGrid shows for West River deer unit WRD-20A (Corson County)
- Its boundary on the map; tap inside it for the unit's card with the agency's regulations link.
- Public land and the other hunting units in the same view, each with its source.
- Season dates once a person has checked them, and legal shooting hours where the rule is checked.
- Hourly wind with a scent cone for every stand, and official weather alerts.
- Offline maps: download the area and use the map, your pins and the forecast with no signal.
Questions
How big is West River deer unit WRD-20A (Corson County) (deer hunting unit)?
About 6,552 km² (2,530 mi²), as HuntGrid maps South Dakota Game, Fish and Parks's boundary.
How much public or protected land is in West River deer unit WRD-20A (Corson County)?
HuntGrid's public land layers map about 432 km² of public or protected land, 7% of the unit; the largest share is managed by Omaha. Public land doesn't always mean you can hunt there.
Where are the season dates for West River deer unit WRD-20A (Corson County)?
This page lists 10 seasons a person has checked against South Dakota Game, Fish and Parks's regulations; the official regulations have the final word.
Which units are next to West River deer unit WRD-20A (Corson County)?
In the same unit system: West River deer unit WRD-64A (Ziebach County).
More on huntgrid.net
Sources
Unit boundary: South Dakota Game, Fish and Parks (unit definitions); U.S. Census Bureau (county boundaries). Licence: Units defined in ARSD 41:06:20:02; county boundaries public domain (U.S. Census Bureau). Boundaries for the 2026 season.
HuntGrid isn't affiliated with South Dakota Game, Fish and Parks. The official regulations and maps have the final word.