Unit 350
3
Steep mountain terrain between Butte and Boulder with rocky ridges and scattered alpine basins.
Hunter's Brief
Unit 350 encompasses rugged foothill country southeast of Butte, where steep slopes rise from lower valleys into alpine ridges. The terrain transitions quickly from sagebrush flats near Butte into timbered mountainsides and rocky summits, with elevation gains of 4,000+ feet creating distinct habitat zones. Access via connected road network reaches major staging areas around Boulder and Canyon Ferry, though terrain steepness limits ease of travel once you leave roads. Mountain goats occupy the upper ridges and cliff systems; expect challenging navigation and significant vertical gain to reach productive terrain.
- Compact: under 200 sq mi
- Moderate: 200 - 800 sq mi
- Vast: over 800 sq mi
- Few: under 25%
- Some: 25 - 60%
- Most: over 60%
- Limited: under 0.7 mi/mi² (backcountry)
- Fair: 0.7 - 1.5 mi/mi²
- Connected: over 1.5 mi/mi² (well-roaded)
- Flat: under 20% mountains
- Rolling: 20 - 55%
- Steep: over 55%
- Sparse: under 20%
- Moderate: 20 - 50%
- Dense: over 50%
- Limited: under 0.3% area
- Moderate: 0.3 - 2% area
- Abundant: over 2% area
Terrain Deep Dive
Landmarks & Navigation
Sacajawea Mountain and Sawtooth Mountain serve as prominent ridge-line references visible from lower elevations and useful for orientation. Sheep Mountain, Avalanche Butte, and Needham Mountain anchor the eastern section, with Devils Tower marking additional high terrain. Grouse Ridge and Elk Ridge provide backbone navigation corridors through middle country.
Major streams including Spring Creek, Thompson Creek, and Elkhorn Creek offer both water access and drainage-following routes. These landmarks cluster naturally—identify a summit and follow ridgelines to connect multiple reference points across steep terrain.
Elevation & Habitat
Lower valleys near Butte and Interstate 90 start around 3,500 feet in sagebrush and grassland terrain, quickly rising through moderate-density conifer forests dominated by Douglas-fir and ponderosa pine. Mid-elevations transition into denser forest with spruce and lodgepole replacing lower-elevation species. Above 6,500 feet, timber becomes more scattered as alpine ridges and rocky summits emerge, with sparse high-country vegetation and cliff systems providing goat habitat.
The steep terrain means vegetation bands are narrow and transitions occur over short distances—hunters experience significant ecological change with minimal linear travel.
Access & Pressure
Well-connected road network with 485 miles of access roads makes initial approach straightforward via Boulder-Whitetail Road and Routes 69/287, with logical staging from Butte, Boulder, and Canyon Ferry. However, road density masks the reality—once past road corridors, terrain steepness severely limits travel. Lower valleys and accessible ridge saddles will see regular pressure, especially near road terminuses and popular creek bottoms.
Upper alpine ridges and cliff systems receive less pressure due to physical demands, but those willing to climb find more solitude. Steep terrain naturally filters casual hunters, concentrating experienced hunters on proven access points.
Boundaries & Context
Unit 350 occupies the mountainous terrain in Silver Bow and Jefferson Counties immediately southeast of Butte, bounded by Interstate 15 on the north and west, Route 69 and Boulder-Whitetail Road on the east, and Interstate 90 on the south. The unit forms a triangular shape roughly 25-30 miles across, with Butte as the primary reference point to the northwest and Boulder to the northeast. This positioning places the unit along the transition zone between the Butte mining district's lower valleys and the higher mountain country of the Elkhorn Range foothills.
Interstate corridors provide logical approach routes and town access.
Water & Drainages
Spring Creek and Thompson Creek are the primary perennial drainages, running year-round through moderate valley sections before becoming steeper and more seasonal at higher elevations. Kennedy Spring and Turnout Spring provide reliable alpine water sources critical for high-elevation hunting. Smaller creeks including Pole Creek, Pike Creek, and Bear Gulch Creek run seasonally depending on snowmelt and precipitation.
Limited water characterization is accurate for upper ridge systems—goat country often lacks reliable sources, making spring knowledge essential for planning water access strategies. Canyon Ferry and surrounding reservoir areas exist outside prime goat terrain but provide base camp logistics.
Hunting Strategy
Mountain goats are the sole target species in Unit 350, making terrain and cliff systems the primary focus. Hunt high ridges where steep terrain provides escape routes and cliff access—goats prefer areas where vertical stone walls and inaccessible terrain dominate. Early-season (late July through August) hunting targets animals on high peaks before weather deteriorates; September can offer window opportunities depending on snow timing.
Glass major summits and ridge systems from distance—Sacajawea Mountain, Sawtooth Mountain, and Sheep Mountain areas warrant methodical glassing from vantage points. Plan for significant elevation gain and route-finding through timbered slopes to reach productive ridges. Water at Kennedy Spring and Turnout Spring vicinity supports goat concentrations during dry periods.