Unit 518

Granite Peak (12,799 ft) is the dominant summit and natural hub for unit orientation. Grasshopper Glacier and surrounding ice fields on the northern plateau provide distinctive landmarks visible from distance. The Beartooth Plateau itself—broad, exposed, and rimmed by peaks—serves as the high-country navigation corridor.

Three Sisters, Mount Villard, and Mount Wilse are recognizable reference points for glassing and route-finding. Lower basins like Antelope Basin and the Zimmer Lake/Star Lake cluster offer alpine lake landmarks. Iceberg Peak marks where northern terrain steepens toward Broadwater drainage.

These features create natural waypoints for backcountry travel and glassing stations on exposed ridge systems.

This unit is extreme high-country terrain. Median elevation sits above 8,500 feet with peaks reaching 12,641 feet, placing most country in active alpine and subalpine zones. Lower elevations feature scattered subalpine fir and whitebark pine mixed with meadows and willows along creek bottoms.

As elevation increases, forest becomes sparse and broken—windswept krummholz giving way to open tundra, talus fields, and scree slopes. The highest terrain transitions to bare rock, permanent snowfields, and glacier remnants. Habitat progression is vertically compressed; gain 2,000 feet and the landscape changes from forested to fully alpine.

This vertical intensity defines goat habitat quality and movement patterns.

Access is challenging. The unit has approximately 125 miles of trail but minimal motorized road penetration. Trailheads at Mystic Lake (west) and East Rosebud Lake (east) are the primary entry points, with shorter foot access from Fishtail area lowlands.

All serious hunting requires backpacking or pack stock; this naturally limits pressure to committed hunters willing to invest multiple days. The high terrain complexity and sustained elevation gain deter casual access. Most pressure concentrates near lower trailheads and established lake basins.

The interior high plateau and remote glacier-fed cirques receive minimal foot traffic. Weather and terrain difficulty are as much barriers as distance; late-season storms can isolate this country for weeks.

Unit 518 sits in the heart of the Beartooth Range, straddling Carbon, Stillwater, and Park Counties along the Montana-Wyoming boundary. The unit is defined by major drainages: the Clarks Fork of the Yellowstone marks the southern and western boundary, while the Broadwater River forms the northern edge and East Rosebud Creek the eastern side. Zimmer Creek and Russell Creek connect these drainages through the interior.

Grasshopper Glacier and Iceberg Peak anchor the northern high country. The landscape is bounded by established trails including the Mystic Lake-East Rosebud connector and defined water features like Fossil Lake and Dead Horse Lake. This arrangement creates a discrete mountainous block with clear geographic definition.

Water is abundant in lower elevations but increasingly scarce at altitude. The Broadwater River and East Rosebud Creek provide reliable flow in their main valleys. Zimmer Creek, West Rosebud Creek, and Russell Creek are dependable drainages through mid-unit terrain.

Higher elevation water includes alpine lakes—Zimmer Lake, Star Lake, Silver Lake, Boulder Lakes, Sky Top Lakes, Storm Lakes—which are accessible but often frozen until July and again by September. Sodalite Creek, Phantom Creek, and other small streams provide supplemental water on moderate slopes. Above 10,000 feet, water becomes spotty; late-season goat hunters must depend on snow, glacier melt, or carry capacity.

Plan water caches or understand spring locations in advance.

Unit 518 is mountain goat country with terrain specifically suited to their vertical habitat requirements. Goats utilize the high talus slopes, cliff bands, and ridgeline terrain from 9,000 feet upward. Early season (September) offers the best window—weather is more stable, terrain is accessible, and goats are distributed across alpine basins and slopes.

Scout from high vantage points like the Beartooth Plateau rim, glassing exposed faces and talus for white shapes. Expect goats near Granite Peak, the glacier complexes, and the Three Sisters area. Late season pushes goats toward lower cliffs and escape terrain.

Route-finding and rock scrambling skills are essential; this isn't hiking terrain. Bring adequate layers and shelter—weather can deteriorate rapidly above 10,000 feet. Plan on significant vertical gain daily and strong map and compass navigation.