Unit 320

The Tobacco Root Mountains dominate the western skyline, providing a clear geographic anchor and glassing opportunities from higher ridges. Noble Peak and the Jefferson-Ruby Divide form the eastern boundary and serve as navigation references. Interior ridges including Strawberry Ridge and features like Tom Graham Pass, Windy Pass, and Spuhler Saddle break the terrain into distinct travel corridors and natural hunting zones.

Several named basins—Whestphal, Bow, Bone, and Shaw—create repeatable geography for hunters planning multiple trips. The South Boulder River drainage in the north offers a linear navigation feature, while lower valleys like Alder Gulch and Bear Gulch provide additional reference points.

The unit spans a significant elevation range from valley floors around 4,250 feet to peaks above 10,500 feet, with most terrain falling in the moderate-elevation zone. Lower elevations support sagebrush flats and grassland meadows typical of Montana's intermountain basins, while mid-elevation slopes transition to ponderosa and Douglas-fir forests. Higher reaches feature spruce-fir timber and alpine parks.

The Tobacco Root Mountains anchor the unit's western side, providing the steepest terrain. Scattered timber throughout creates a patchy landscape rather than continuous forest—plenty of open ridges for glassing mixed with timbered draws and basins that concentrate wildlife.

The connected road network totaling over 1,200 miles provides extensive access via established routes, with Montana Highway 287 serving as the primary corridor along the unit's western and southern edges. The South Boulder River road and multiple county roads offer secondary access into interior basins and ridges. This connectivity makes the unit accessible to hunters but also means popular entry points can see pressure.

Terrain complexity (7.8/10) combined with rolling topography means hunters can easily find solitude by moving away from main roads—the unit is large enough that exploring side drainages and upper basins requires effort and separates committed hunters from casual access. Private land interspersed throughout creates a patchwork; careful attention to boundaries is essential.

Unit 320 occupies portions of Madison, Jefferson, and Silver Bow Counties in southwestern Montana, anchored by Virginia City on its southern boundary. The unit's northern edge follows Interstate 90 and the South Boulder River drainage, while the eastern and western boundaries track the Jefferson-Ruby and Madison-Ruby Divides. This creates a large, complex unit that encompasses classic Montana intermountain geography—a mix of ranching valleys, timbered ridges, and high-elevation basins.

The unit's size and terrain make navigation important; several named towns including Brandon, Alder, and Mammoth sit within or near boundaries as reference points.

Water is the limiting factor across this unit. Reliable sources include springs scattered throughout—Hankins, Bain, Westphal, and Gooseberry Springs offer consistent water in key locations. Several small lakes exist at higher elevations including McKelvey, Skytop, Gneiss, and Sailor Lakes, though these are seasonal and weather-dependent.

Creeks like Currant Creek, Spring Creek, and Peacock Creek flow through select drainages but many are intermittent or low-flow by mid-summer. The South Boulder River provides reliable water along the unit's northern boundary. Hunters should map water sources before entry and plan camp locations accordingly.

Willow-lined creeks and marsh areas attract moose, making water location integral to strategy.

Unit 320 is moose country, with habitat focused on the wetter draws, willow-lined creeks, and timbered basins where browse is abundant. Early season hunting targets moose in high-elevation parks and timber edges during late summer; as temperatures drop, animals move to mid-elevation drainages and creek bottoms with quality browse. The rolling terrain and moderate forest cover allow effective glassing from ridges and open parks, but hunting moose also requires hiking into timbered draws where visibility is limited.

Scout water sources—springs and creeks attract moose during the heat of early season. Mid-unit basins like Bone and Shaw offer concentrated opportunity. Later season pushes animals into dense timber and lower valleys where calling and careful stalking become more productive.

The unit's complexity rewards hunters who invest time learning drainage systems and moose sign patterns rather than relying on road-based access.