District 424, Montana

Rugged backcountry mountain terrain with elevations ranging from approximately 4,100 feet in the valley bottoms to 8,400 feet on the high ridgelines and peaks near the Continental Divide. The landscape is characterized by long, undulating mountain ridges, sweeping canyons, steep rocky faces, massive rock walls, and cliffs throughout — with the Rocky Mountains rising almost vertically from the foothills. The South Fork of the Sun River and its tributaries cut through the district. Access into the interior requires significant elevation gain.

HD 424 is 98.2% public land (U.S. Forest Service, Helena-Lewis and Clark National Forest). There is no private land within the unit boundaries. Primary motorized access is via Benchmark Road (Forest Road 235): from Augusta, travel west on Ranger Station Road approximately 17 miles, then west on FR 235 approximately 13–15 more miles to the Benchmark Campground and trailhead — a total of roughly 30 miles of dirt road from Augusta. The Benchmark Campground (25 sites, with feed bunks and hitching rails for stock) serves as the main staging area. From Benchmark, the trail system provides access to multiple drainages including the South Fork Sun River (Trail 202/203), West Fork Sun River, Straight Creek, and the Danaher River. USFS trails 202, 203, 211, 212, 232, 248, and 270 provide routes deep into the wilderness; the South Fork Sun River Trail (Trail 202) is a main corridor. The Chinese Wall along the Continental Divide is accessible via approximately 16 miles of trail from Benchmark. South Fork Campground (7 sites) lies 31 miles west of Augusta. Horseback and pack-string access is popular and practical given the distances; nearly all backcountry travel is non-motorized within the designated Bob Marshall Wilderness. The district is heavily outfitted — competition between DIY hunters and outfitter operations exists. No private-land access issues within the unit; however, access to trailheads via Benchmark Road crosses some private lands on the approach corridor east of the forest boundary.

The valleys are open and grassy with riparian corridors along the Sun River drainages. Mid-elevation slopes are heavily timbered with subalpine fir, Engelmann spruce, and lodgepole pine interspersed with open parks and meadows of grass and forbs. Higher elevations transition to dry-mesic spruce-fir and subalpine vegetation typical of the Rocky Mountain Front. Open parks and grassland benches occur throughout and serve as critical elk and deer forage areas. The Bob Marshall Wilderness portion of the district contains largely roadless old-growth conifer.

Elk are the dominant big game species, with HD 424 forming part of the Sun River elk herd (HDs 424, 425, and 442 combined), which numbered approximately 2,300 animals as of spring 2025. Elk are strongly associated with the backcountry, particularly the adjacent Sun River Game Preserve where no hunting is permitted. The herd undertakes a notable annual winter migration eastward out of the game preserve and high-country wilderness areas to lower-elevation winter range; hunter success is highly dependent on severe early-season weather that triggers this migration. Bull elk utilization of HD 424 is significant during the rut as animals disperse out of the preserve. Mule deer are present on the open slopes and benches; spring 2025 surveys for the southern Rocky Mountain Front group (including HD 424) showed populations 11% below long-term averages, but fawn recruitment was 30% above average. White-tailed deer occur in the riparian corridors and lower-elevation timber. Rocky Mountain bighorn sheep inhabit the steep rocky terrain — HD 424's Ford Creek/Sun River herd historically served as genetic source stock for statewide transplants, but the herd has declined to roughly half historic levels due to recurring disease outbreaks and poor lamb recruitment. Black bear are present throughout the timbered drainages. Mountain lion inhabit the district. Grizzly bears are present and active in the district — bear-aware protocols are mandatory. Gray wolves are present in the Bob Marshall Wilderness Complex ecosystem.

1. HD 424 elk season structure changed for 2026: the long-standing numerical quota system (in place since ~1964) was eliminated and replaced with antlerless-only harvest permitted during the first four days of general season; all-season brow-tined bull hunting remains on the general OTC license. The 2025 reported_harvest of 11 elk (9 bulls + 2 cows) reflects the final quota-based season; quota was 10. 2. The bighorn sheep district 424 (Ford Creek/Sun River herd) uses a separate district numbering from the big game elk/deer HD 424 — both appear to share the same number per different FWP species designation systems; this profile covers the big-game HD 424. Bighorn sheep herd is at ~50% of historic levels; current permit issuance is uncertain and may be suspended or very limited. 3. Public land percentage: GoHunt reports 98.2%; the bighorn sheep profile GoHunt page reports 68% for a larger 309-sq-mi footprint that includes surrounding lands — the 98% figure refers to the core 95-sq-mi big-game HD boundary. 4. Pronghorn: the FWP Region 4 forecast groups southern Rocky Mountain Front HDs (including 424) for pronghorn management; pronghorn are largely peripheral to this wilderness-dominated unit and a specific antelope tag for HD 424 was not confirmed. 5. Moose: present in the Bob Marshall Wilderness ecosystem but specific permit availability for HD 424 was not confirmed. 6. Mountain goat: suitable habitat exists along the Continental Divide but permit availability specifically for HD 424 was not confirmed. 7. Muzzleloader season for deer: Montana does not have a statewide separate muzzleloader deer season — muzzleloaders are legal during archery and general rifle seasons. A Heritage Muzzleloader elk season (Dec 12–20) does exist statewide. 8. Season dates are 2026 statewide defaults per FWP; district-level variations should be verified in the official annual regulations booklet.