deer hunting unit · South Dakota Game, Fish and Parks
East River deer unit ERD-12A (Bon Homme 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 East River deer unit ERD-12A (Bon Homme County)
East River deer unit ERD-12A (Bon Homme County) is a deer hunting unit in South Dakota, United States, set by South Dakota Game, Fish and Parks. It covers about 1,506 km² (582 mi²). No town of the HuntGrid list lies inside it; the nearest is Yankton, about 20 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
- 12A
- Area
- 1,506 km²
- Area (miles)
- 582 mi²
- Boundaries
- 2026
Public and protected land mapped inside it
HuntGrid's public land layers map about 86 km² of public or protected land inside it, 6% 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 | 74 | 5% |
| Unknown | 17 | 1% |
| Bon Homme County Waterfowl Production Area | 4.7 | under 1% |
| BON HOMME COUNTY WATERFOWL PRODUCTION AREA | 4.7 | under 1% |
| South Dakota Game Fish and Parks - Wildlife Division | 0.8 | under 1% |
| Nebraska Game and Parks Commission’ | 0.8 | under 1% |
| Bureau of Land Management | 0.1 | under 1% |
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 |
|---|---|---|
| Mule deer | Nov 21, 2026 to Dec 6, 2026 | antlered, firearm, draw source |
| White-tailed deer | Nov 21, 2026 to Dec 6, 2026 | antlered, 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
- East River deer unit ERD-07A (Yankton County)
- East River deer unit ERD-17A (Charles Mix County, excluding Lake Andes NWR)
- East River deer unit ERD-37A (Hutchinson County)
Other hunting units that cover part of it
- Prairie turkey unit 12A (Bon Homme) (turkey hunting unit)
- Archery deer unit ER1 (East River) (archery and muzzleloader deer unit)
- Prairie elk unit ERA (East River) (elk hunting unit)
- East River zone (bobcat zone)
- Low Plains middle zone (duck zone)
- Low Plains south zone (duck zone)
- Nonresident waterfowl unit NRW-00A
- 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)
- Dark goose Unit 2 (goose hunting unit)
What HuntGrid shows for East River deer unit ERD-12A (Bon Homme 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 East River deer unit ERD-12A (Bon Homme County) (deer hunting unit)?
About 1,506 km² (582 mi²), as HuntGrid maps South Dakota Game, Fish and Parks's boundary.
How much public or protected land is in East River deer unit ERD-12A (Bon Homme County)?
HuntGrid's public land layers map about 86 km² of public or protected land, 6% 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 East River deer unit ERD-12A (Bon Homme County)?
This page lists 2 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 East River deer unit ERD-12A (Bon Homme County)?
In the same unit system: East River deer unit ERD-07A (Yankton County), East River deer unit ERD-17A (Charles Mix County, excluding Lake Andes NWR) and East River deer unit ERD-37A (Hutchinson 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 41:06:21:02; 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.