Unit 520
5
Vast high-country sprawl from Interstate 90 foothills to Beartooth alpine, with rolling terrain and moderate timber throughout.
Hunter's Brief
Unit 520 encompasses rolling terrain from the Big Timber area south toward the Wyoming border, spanning low valleys to high alpine country. Access is fair, with over 2,800 miles of road throughout the unit providing multiple staging options from towns like Big Timber, Columbus, and Red Lodge. Elevation ranges from low valleys to above 12,600 feet, with terrain that shifts from open grassland to timbered slopes. Terrain complexity is high—the unit covers substantial ground with varied habitat, requiring solid navigation and mountain skills.
- 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
The Beartooth Mountains dominate the southern skyline, with notable peaks like Granite Peak, Cathedral Peak, and Breakneck Mountain serving as distant reference points. Lower elevation features include the Hellroaring Plateau and Stillwater Plateau as major geographic divides. Several glaciers—Sundance, Beartooth, and Grasshopper—mark high country orientation.
Key valleys and drainages like Natural Bridge Draw and the Boulder River system provide natural navigation corridors. Cliffs including the Greycliffs and Limestone Palisades define terrain breaks. These scattered landmarks are widely spaced given the unit's size, requiring map and compass work.
Elevation & Habitat
Terrain transitions dramatically from low sagebrush and grassland basins around 3,400 feet to alpine ridges and peaks above 12,600 feet. Mid-elevation zones feature rolling slopes with scattered timber and open meadows—classic transition country where multiple habitat types meet. Higher elevations show denser conifer stands interspersed with alpine meadows and talus.
The rolling topography means terrain varies within short distances; ridge systems offer natural travel corridors while basins concentrate water and game during dry periods. Habitat diversity supports multiple species across different seasons.
Access & Pressure
Over 2,800 miles of roads crisscross the unit, providing fair access from multiple directions. Big Timber, Columbus, Red Lodge, and Bridger serve as logical staging towns with services and camping. Roads penetrate valleys and some mid-elevations, but higher country remains roadless.
The unit's vast size means pressure disperses across many drainage systems; hunters concentrating near main roads and obvious trailheads leave significant backcountry untouched. Terrain complexity and distance separate casual hunters from serious ones. Early season may see pressure in accessible zones, but the unit's scale absorbs hunters who are willing to move away from easy access points.
Boundaries & Context
Unit 520 occupies most of central south-central Montana, bounded by Interstate 90 on the north near Big Timber, dropping south through Carbon, Park, Stillwater, and Sweet Grass Counties to the Wyoming border. The unit's eastern edge follows US highways 212 and 310 near Joliet and Bridger, while the western boundary traces major ridgelines including the Yellowstone-Rock Creek divide and Boulder-Stillwater divides. This sprawling unit encompasses multiple drainage systems and extends from accessible lower valleys to high alpine terrain, creating distinct hunting zones throughout.
Water & Drainages
Water is limited and scattered, requiring strategic planning. Major streams include Falls Creek, Grouse Creek, East Fork Mendenhall, and Wild Creek, but these are spread throughout the unit. Several lakes exist at mid to high elevation—Horseshoe Lake, Glacier Lake, Divide Creek Lake—but low-elevation basins can be dry.
Springs are present but unreliable; scattered springs like Ross Spring and Wildcat Spring offer backup water but shouldn't be depended on. The unit's size and elevation gradient mean water availability shifts seasonally; higher elevations hold water longer into fall while low valleys dry up.
Hunting Strategy
Unit 520 holds black bears across elevation gradients. Low-elevation sagebrush basins and grasslands provide spring habitat and berry-rich parks at mid-elevation. Early season hunts focus on lower slopes and benches as bears move between elevation zones; late summer offers high-country opportunity as bears work alpine meadows and talus seeking food.
The rolling topography and scattered timber work for both stalking and still-hunting. Water access dictates bear movement in drier sections. Given the unit's size and complexity, success demands solid navigation, physical conditioning, and understanding how bears use elevational transitions.
Glassing distant slopes and drainages from high vantage points can locate feeding bears, but approach demands stealth through variable cover.