Unit 370
3
Rolling foothills and open parks between Boulder and the Boulder-Whitetail Divide with pronghorn country.
Hunter's Brief
Unit 370 is rolling foothill terrain in Jefferson County south of Boulder, mixing open parks and moderate timber across lower elevations. Access is fair with about 105 miles of road, though density varies across the unit. Water comes from scattered springs and creeks including Cottonwood Creek and Farnham Creek, but sources can be sparse in some areas. The terrain supports pronghorn hunting across sagebrush parks and grasslands interspersed with ridges and draws. Moderate complexity and decent accessibility make this a workable unit, though you'll need to locate reliable water sources and understand seasonal movement patterns through the park systems.
- 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
Several geographic anchors help with orientation and navigation. Sheep Rock provides a recognizable landmark in the western portions. Wilson Ridge runs through the unit offering elevation and glassing opportunities across the surrounding parks.
The numerous named parks—Long Park, Brady Park, McCauley Park, Quaintance Park, Swampy Park, Grouse Park, and others—define the primary pronghorn habitat and serve as natural gathering areas. Dunn Peak and Red Hill provide secondary reference points for high-elevation navigation. Cottonwood Creek and its South Fork establish a drainage system that guides movement through the central unit.
These interconnected features create a landscape hunters can navigate and reference without excessive technical navigation.
Elevation & Habitat
The unit spans lower mountain terrain rising from around 4,300 feet near Boulder to over 8,400 feet along the divide. Most country sits below 5,500 feet, emphasizing rolling foothills with open grasslands and sagebrush parks. Moderate forest coverage creates a mosaic of open meadows and scattered timber stands, typical of the transition zone between valley bottoms and higher forest.
Aspen groves and ponderosa stands punctuate the landscape, while extensive parks and flats provide the primary pronghorn habitat. The rolling topography creates numerous draws, ridges, and benches that break up the terrain, offering both thermal cover and visibility for glassing. This mix of open country and scattered timber defines the hunting character throughout the unit.
Access & Pressure
The unit contains approximately 105 miles of road with fair accessibility overall. Route 69 provides the primary northern access from Boulder, while the Boulder-Whitetail Road serves the southern sections. Road density varies across the terrain, creating pockets of easier and more remote access.
The fair access rating suggests moderate hunting pressure potential, with most hunters likely concentrating along the main routes and named parks. The rolling topography and scattered nature of open country allow hunters to spread out and find less-pressured areas by moving away from primary road corridors. Spring and fall seasons will concentrate pressure, but the moderate size and decent road network provide options for finding less-hunted country with effort.
Boundaries & Context
Unit 370 occupies the southern portion of Jefferson County between Boulder and the Boulder-Whitetail Divide. The boundary runs south from Boulder along Route 69 to the Boulder-Whitetail Road, follows the divide southward to Interstate 90, then traces the Boulder River drainage north back to Route 69. The unit sits in the transition zone between the Boulder Valley and higher elevation country to the south. Interstate 90 forms the eastern boundary, providing a clear geographic reference.
The Boulder River defines the northern drainage, while the Boulder-Whitetail Divide separates the unit from higher terrain beyond. This positioning makes the unit accessible from Boulder while still maintaining reasonable isolation from the main highway corridor.
Water & Drainages
Water availability is limited, requiring strategic planning. Cottonwood Creek and its South Fork represent the most reliable perennial sources, running through central drainages. Farnham Creek provides additional water on the western side.
Numerous springs scattered throughout the unit—Rosie Murphy Spring, Upper Quaintance Spring, Elk Run Spring, Tom Spring, and others—supplement seasonal flow. McKanna Spring Creek, Jack Creek, Dunn Creek, and Quinn Creek represent drainage systems that may hold water seasonally. The ditch systems (Carey Ditch, Murphy Ditch) exist but are irrigation infrastructure rather than reliable hunting water.
Success depends on locating active springs and understanding seasonal creek conditions. Early season and post-rain periods likely offer better water availability than late summer.
Hunting Strategy
Unit 370 is pronghorn country, with rolling parks and grasslands providing the primary habitat. Early season hunting focuses on the extensive park system where pronghorn feed on fresh vegetation. Glassing from Wilson Ridge and other elevated benches allows hunters to spot animals across the open country.
As season progresses, pronghorn retreat to areas near reliable water sources—focus on Cottonwood Creek drainages and active spring systems. The rolling terrain creates numerous vantage points for long-distance glassing, a critical advantage for pronghorn hunting. Wind patterns through the parks matter significantly given the open terrain.
Moderate complexity suggests the terrain requires some effort to navigate effectively but remains workable for properly prepared hunters. Water location and understanding pronghorn movement between grazing and water sources form the core strategy.