Unit G10
TENMILE
High alpine terrain of the Tenmile Range with steep cliffs, cirque basins, and windswept ridges above treeline.
Hunter's Brief
G10 encompasses the rugged high country of the Tenmile Range between I-70 and the Continental Divide. This is classic mountain goat terrain—steep alpine slopes, cliff bands, and talus fields dominating elevations above 9,000 feet. Access is via I-70 corridor near Copper Mountain and Frisco, with connected road networks providing staging areas. Water is limited at elevation but reliable spring-fed streams drain the major gulches. Expect exposed, technical terrain requiring scrambling ability and strong glassing skills to hunt goats effectively across this compartmentalized country.
- 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 Tenmile Range itself provides the dominant navigation feature, with named peaks including Peak Ten, Mount Helen, Peak One, and Crystal Peak serving as visual reference points for glassing and orientation. Boreas Pass and Rocky Point offer elevated vantage spots for distant scanning. The major cirque basins—Clinton Amphitheatre and Horseshoe Basin—concentrate goat populations and provide natural travel corridors.
Hoosier Ridge, Ceresco Ridge, and the prominent cliff bands around Rocky Point define escape terrain and rocky habitat preferred by goats.
Elevation & Habitat
Entirely above 9,000 feet, G10 is almost exclusively alpine and subalpine terrain. The unit transitions from mixed conifer stands in lower cirques and protected basins to open tundra, exposed ridges, and windswept summits at the highest elevations. Sparse tree islands dot the upper slopes, with most of the hunting happening above timberline on scree, talus, and grass slopes.
The moderate forest coverage appears concentrated in sheltered drainages and basins like Clinton Amphitheatre and Horseshoe Basin, while the ridges and upper peaks remain largely barren—ideal goat habitat.
Access & Pressure
Connected road networks provide excellent access via I-70 and the Summit County corridor near Copper Mountain and Frisco. With 448 miles of roads in the unit, staging areas are straightforward to reach, making this a relatively accessible alpine hunt. The proximity to population centers and ease of access create moderate to heavy pressure potential, particularly on weekends during the early season.
Hunters should anticipate competition and plan to move into less-pressured basins or higher saddles to find unpressured goats.
Boundaries & Context
G10 is bounded by I-70 on the north, Colorado 9 and Boreas Pass Road on the east, the Continental Divide on the south, and Colorado 91 plus I-70 on the west. The unit straddles Summit, Park, and Lake counties near the mountain communities of Copper Mountain and Frisco. The Tenmile Range forms the geographic heart of the unit, with elevations ranging from the I-70 corridor upward to 14,000-foot summits.
This is highly accessible high-country terrain sandwiched between major highways and populated areas, making it a destination unit for alpine hunters.
Water & Drainages
Water is scarce at elevation, with reliable sources limited to spring-fed streams draining the major gulches. Blue Rock Spring and Iron Springs provide confirmed water; North Tenmile Creek, Crystal Creek, Bemrose Creek, and Pacific Creek drain the major slopes. Several high-altitude lakes including Wheeler Lake, Mayflower Lakes, Crystal Lake, and the Lower and Upper Crystal Lakes hold water seasonally.
Most productive hunting will require understanding where goats descend to drink—these drainage systems are critical for locating animals during dry periods.
Hunting Strategy
G10 is pure mountain goat country. Success requires glassing from distance—use the elevated ridges and prominent peaks as glassing stations to locate white coats on distant slopes and cliff bands. Focus on cirque basins where goats concentrate, particularly Clinton Amphitheatre and Horseshoe Basin.
Hunt the steepest, most technical terrain; goats are security-driven and will occupy cliffs and talus slopes inaccessible to most hunters. Early season hunting targets goats at higher elevations before weather pushes them lower. Water sources become critical in late season—position yourself where goats must descend to drink.
This unit demands physical conditioning, scrambling ability, and comfort with exposure; it's not beginner terrain.