Unit 320

Noble Peak anchors the southern ridge divide, serving as a major visual reference and natural boundary. The Tobacco Root Mountains define the unit's backbone and provide excellent glassing country from high saddles like Tom Graham Pass and Mustard Pass. Strawberry Ridge runs as a secondary feature with navigational value.

Lakes scattered throughout—Granite, Jackson, Twin Lakes, and others—serve dual purposes as water sources and navigation waypoints. Five Trough Spring and other named springs are critical for hunters in a water-limited unit. The South Boulder River and Currant Creek form major drainages worth following into higher country.

The unit ranges from low valley floors around 4,200 feet to alpine ridges exceeding 10,500 feet, though the data suggests concentrated acreage in mid-elevation bands rather than sprawling lowlands. Moderate forest coverage indicates a mix of timbered slopes and open terrain rather than dense wilderness. Valley bottoms and benches support sagebrush grasslands and scattered conifers, while higher ridges transition to subalpine meadows and sparse timber.

The Tobacco Root Mountains themselves form a substantial high-country spine, with substantial elevation gain creating distinct zones where elk move seasonally. This elevation spread supports both summer alpine hunting and lower-elevation transition zones.

Over 1,200 miles of roads thread through Unit 320, creating good connectivity but also indicating moderate to heavy access pressure in accessible areas. Gateway communities—Virginia City, Sheridan, Alder, and Norris—provide logical staging points with services and outfitter infrastructure. The road network densifies around valley bottoms and lower ridges, meaning higher-elevation terrain and basin country offer more solitude.

Early season pressure concentrates around road-accessible ridges and lakes; terrain complexity (7.8/10) rewards hunters willing to hike beyond trailheads. Interstate 90 borders the unit, making it attractive for weekend pressure. Smart hunters should target mid-elevation ridges and upper drainages where road access thins.

Unit 320 encompasses a sprawling section of southwestern Montana centered on the Tobacco Root Mountains and their surrounding valleys. The boundary runs from Virginia City along Highway 287 northwesterly through the heart of gold-rush country, then drops to Interstate 90 before following the South Boulder River and ridge systems back to Virginia City. The unit spans portions of three counties—Madison, Jefferson, and Silver Bow—and includes historic mining communities like Sheridan, Alder, and Cardwell as natural staging points.

This is established ranch and mining country with a mix of public and private land, bounded by some of Montana's most recognizable high peaks and river drainages.

Despite a 'Limited' water designation, the unit maintains scattered reliable sources that concentrate wildlife. Major creeks—South Boulder River, Currant Creek, Mill Creek, and Wickham Creek—run through valley bottoms and offer reliable flows, especially early season. Numerous reservoirs and lakes including Ziegler, Nelson, Bismark, and the Branham Lakes provide both wildlife water and hunting access points.

Springs are dispersed rather than abundant, making them important navigation markers. Water scarcity in mid-elevation sagebrush zones can push animals toward drainages, concentrating opportunities, though high-country lakes and snowmelt support summer elk. Hunters must plan water strategy carefully, particularly for late-season efforts in drier basins.

Unit 320 supports elk, mule deer, white-tailed deer, and mountain lion across distinct elevation zones. Elk migrate seasonally from lower basin country in fall through mid-elevation transition zones into high-country meadows above 8,000 feet by summer. Mule deer concentrate on rolling sagebrush ridges and aspen transitions, particularly in spring and early fall.

White-tailed deer favor creek bottoms and timbered valleys where water and cover align. Early season (September) means high-country glassing on ridges like Strawberry Ridge and around alpine lakes. Fall migration funnels elk through drainages like Currant Creek and the South Boulder system—key corridors for ambush hunting.

Late season pushes survivors to lower basins and benches where snow limits access. Spring hunting targets post-winter concentration in valley meadows before migration upslope.