3,639.1 Acres - Ziebach County, SD
Friday, December 4, 2026 - 2:00 PM
mst
Auction Note
Wide-open grass country in western Ziebach County, the Bierman Ranch is a generational property that has been carefully managed and steadily improved into the working ranch it is today. The offering totals 3,639.1 +/- acres across two parcels: a single parcel offering a 3,479.1 +/- acre contiguous grass ranch located 11 miles west of Isabel on SD Highway 20, and a separate 160 +/- acre CRP parcel located approximately 3 miles north of Glad Valley, SD.
Historically operated as one grazing unit, this ranch is now offered as a single parcel reflecting how it has always performed best. The landscape carries a slight roll with several breaks and draws that give livestock natural protection through the grazing seasons, and year-round habitat for wildlife. The grass composition is predominantly native, carefully maintained by the family and consistently productive in a part of South Dakota where native range carries real weight.
Water is a genuine strength across the ranch. Four wells are strategically positioned across the property, each paired with a stock tank. Well-placed stock dams add additional coverage, and a tributary of Irish Creek traverses the entire property with seasonal flow that feeds several of the stock dams. A modest ranch headquarters anchors the operation with working corrals and functional support infrastructure. Additional improvements include a shop, barn, serviceable outbuildings, and a modest manufactured home located in the northeast corner of the ranch. The separate 160 +/- acre CRP parcel adds 143.91 +/- acres enrolled through September 2035, with the 2027 CRP payment and beyond conveying to the buyer.
This is a well-put-together grass ranch in strong native range country, fenced and watered to run cattle from day one.
PROPERTY INSPECTION
By Appointment Only
Parcel 1
The main ranch is 3,479.1 +/- contiguous acres of predominantly native grass, fenced and grazed as one working unit. Topography carries a slight roll broken up by natural draws that provide protection for livestock through the grazing seasons and year-round habitat for wildlife. Four wells are strategically positioned across the property, each paired with a stock tank, while additional water coverage is provided by the seasonal flow of Irish Creek that feeds several of the stock dams. Grass has been carefully maintained for consistent, sustained production and range health. Parcel 1 also features a working headquarters with a modest home, working corrals, barns and a shop. Also included with Parcel 1 is a 160 +/- acre grazing lease with the South Dakota Office of School and Public Lands, which will be assigned to the buyer subject to review and approval by the Office of School and Public Lands.
Headquarter Details:
- Located in Section 29
- Manufactured Home: 1,840 sq. ft.
- Shop: 38 x 65 ft.
- Barn: 32 x 112 ft.
- Barn: 50 x 50 ft.
- Corrals and Outdoor Working Facility
Parcel 2
A 160 +/- acre parcel located approximately 3 miles north of Glad Valley, SD, enrolled in CRP with 143.91 +/- acres under contract through September 2035. A small tributary of the West Fork of East Twin Butte Creek traverses the southwest corner. The 2027 CRP payment and all payments beyond convey to the buyer, providing steady annual income through the balance of the contract. The parcel is also enrolled in a South Dakota Game, Fish and Parks Hunting Access program (walk-in public hunting). Any future annual payments from South Dakota Game, Fish and Parks will convey to the buyer at closing.
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Driving Directions
To Parcel 1 (Main Ranch): From Isabel, SD, drive west on SD Hwy. #20 for 11 miles to Gopher Ave., then drive north for 2 miles to Bierman Ranch Road. Turn and drive west for 1.7 miles to the ranch headquarters. When the road comes to a "Y," stay left.
To Parcel 2 (CRP Parcel): Drive 3 miles north of the Glad Valley Fire Department on 216th Ave. to the property on the northwest side of the intersection.