District 401, Montana

The Sweet Grass Hills are intrusive igneous stocks — not laccoliths — forced up from below and solidified during the early Paleogene period. They rise more than 3,000 feet above the surrounding plains. Surrounding prairie sits at approximately 3,100 ft elevation; major peaks reach West Butte 6,983 ft, East Butte (Mount Brown) 6,958 ft, and Gold Butte 6,512 ft. Upper slopes were not glaciated and would have stood above the ice sheet during the last glacial maximum. Lower terrain is gently rolling native grassland and dryland farmland. Total district size is approximately 1,810 square miles.

Public land makes up approximately 10% of the district; the remaining 88-90% is private (grazing, hay, and dryland grain farmland). No National Forest, no Wilderness areas, and no Wildlife Management Areas are present in HD 401. BLM lands (Havre Field Office, 406-262-2820) are concentrated on East Butte. The primary public access route to East Butte runs north from US Highway 2 approximately 2 miles west of Chester via Whitlash Road, then east through the community of Whitlash on Black Jack Road, then south roughly 9 miles to a signed BLM parking area at the base of East Butte; the hike from the parking area is steep. A seasonal road also provides access from the north for connecting BLM and DNRC parcels on East Butte. West Butte public land access is more limited and typically requires landowner permission. Montana FWP Block Management Areas (BMAs) substantially expand hunting access: a BMA covering the majority of East Butte has been in place since the mid-1990s; additional BMAs operate in the Sweet Grass Hills corridor near Whitlash and Oilmont. To hunt any Region 4 BMA a hunter must obtain an annual BMA map from FWP Region 4 (406-454-5840 or fwpr4bmp@mt.gov). Interstate 15 forms the western boundary at Sweetgrass (Port of Entry); US Highway 2 forms the southern boundary running Shelby-to-Chester. Private-land hunting is essentially unavailable without BMA enrollment or personal landowner permission.

Butte slopes support Douglas-fir as the dominant conifer, with ponderosa pine also present on drier aspects. The forested zones exist because the elevated hills receive substantially more precipitation than the surrounding plains (the Goldbutte weather station records approximately 15 inches annually; upper slopes receive more). At lower elevations and outside the butte cores, native mixed-grass prairie (wheatgrass, bluebunch, Idaho fescue), sagebrush, and dryland grain agriculture predominate. Drainages flowing off the buttes (Sage Creek, Little Sage Creek, Breed Creek, Corral Creek, Trail Creek) support riparian shrub corridors. This forested-island-in-grassland structure makes the hills a biological hotspot compared to surrounding plains habitat.

Elk are the headline big-game species; the 2025 winter aerial survey counted 739 elk (average approximately 716 over recent years), reported as above the FWP population goal of 450-650 (source: FWP Region 4 elk plan; PDF not extractable for independent verification). The herd is roughly evenly split between West Butte and East Butte complexes and occupies the same ranges year-round, though bull elk make irregular seasonal movements into and out of Alberta and Saskatchewan. Mule deer are present across the district, particularly on and around the buttes and adjacent creek drainages; white-tailed deer numbers have been increasing, primarily in draws and farmland edges. EHD outbreaks in recent years affected deer populations; FWP has curtailed antlerless deer harvest to facilitate recovery. Pronghorn antelope inhabit the lower-elevation grasslands and farmlands surrounding the buttes. A small moose population occupies the riparian corridors and forested drainages on the buttes. Black bear and mountain lion are present in the forested butte habitat. Wolf presence is possible given proximity to the Canadian border.

1. Geology correction: the Sweet Grass Hills are igneous stocks, not laccoliths; Wikipedia and USGS usage consistently describe them as stocks. 2. Precipitation correction: the draft's '18-20 inches' figure is unsupported; the Goldbutte weather station records approximately 15 in/year; upper butte slopes likely receive more but no verified figure was found. 3. Elk count (739, goal 450-650): sourced from FWP PDF documents that were binary-encoded and not independently extractable by web fetch; retain with caveat. 4. Season dates updated to 2026 FWP-published dates (archery Sept 5, general Oct 24, muzzleloader Dec 12). 5. BMA specific numbers (157, 202) removed as unverified; BMA presence on East Butte and near Whitlash/Oilmont retained as broadly supported. 6. 25% hunter success is a management target, not an observed rate. 7. Verify current antlerless deer B-license availability and antelope quotas annually at fwp.mt.gov before hunting.