Unit 45C
Yuma
Low-desert basin and range country surrounding Kofa National Wildlife Refuge with scattered water sources.
Hunter's Brief
Unit 45C is open low desert and bajada terrain surrounding the Kofa refuge boundary, with elevations ranging from roughly 800 feet in the basins to 3,500 feet on the ridgelines. Access is limited to scattered ranch roads and refuge boundaries—expect minimal development and significant hiking once you leave the vehicle. Water is the critical factor here; scattered tanks and tinajas support wildlife but require scouting. Most hunting pressure concentrates near known water sources and accessible wash bottoms. The sprawling terrain offers solitude but demands navigation skills and water logistics planning.
- 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
Castle Dome Peak and Black Hills serve as primary navigation anchors visible across the open terrain, making them valuable for cross-country glassing. La Cholla Wash and McPherson Wash provide natural corridors for travel and wildlife movement. Natural Arch and Arch Tank offer distinctive reference points in the featureless basin country.
The scattered tank system—Burnt Wagon, Hanging Rock, Salton Tanks, and others—marks critical water sources that concentrate wildlife seasonally. Doc Carter Spring and Dixon Spring represent more reliable water sources. These landmarks are essential for navigation and water logistics in this expansive, sparsely developed landscape.
Elevation & Habitat
Terrain spans from low desert basins around 800 feet to rocky ridgelines topping 3,500 feet, with most ground sitting between 1,200 and 2,000 feet. The landscape is predominantly open desert bajada broken by low mountain ranges—Castle Dome and Black Hills provide elevation change. Vegetation is sparse desert scrub: creosote, bursage, and scattered cholla with occasional palo verde in wash bottoms.
Higher ridges support more robust vegetation but remain relatively open. This is genuinely arid country with vegetation adapted to minimal rainfall.
Access & Pressure
Road access is limited to roughly 111 miles of ranch roads and refuge-adjacent tracks—mostly two-track or rough four-wheel-drive routes. There are no major highways crossing the unit; access is deliberately remote. This limited infrastructure means hunting pressure is naturally dispersed and light, but it also means most serious hunting requires substantial walking from vehicle parking areas.
The refuge boundary restricts access in significant portions of the unit. Hunters willing to work on foot and navigate without developed infrastructure will find genuine solitude here.
Boundaries & Context
Unit 45C wraps around the Kofa National Wildlife Refuge in southwestern Arizona, bounded by Stone Cabin-King Valley Road on the north and west, with the refuge forming the eastern and southern perimeter. The unit sits in the lower Colorado Desert region where the Castle Dome Mountains anchor the landscape. This is remote country—the nearest towns are substantial distances away, and the unit remains relatively isolated from major population centers.
Expect limited services and substantial self-sufficiency requirements for hunting trips.
Water & Drainages
Water is severely limited and scattered—this is the defining constraint of Unit 45C. Multiple natural tanks (Arch, Hollow Rock, Hanging, Chain, Red, Burnt Wagon, Salton, Saguaro, McPherson, Little White) are the primary water sources, but reliability varies dramatically with seasonal rainfall. Tinajas like Tinaja Sega hold water in pockets within washes but require knowledge to locate. Springs including Doc Carter and Dixon provide more reliable sources but require scouting to confirm flow.
Gravel Wash and McPherson Wash offer seasonal water flow. Success here hinges on identifying functional water sources pre-season and planning movement accordingly.
Hunting Strategy
Unit 45C historically supports desert bighorn and mule deer using the rocky bajada and mountain slopes; javelina occupy the scrub throughout; pronghorn range the open basins. Elk and bison populations exist but are marginal in this arid terrain. Bears are present in low numbers.
Mountain lion hunting potential exists. The sparse vegetation means glassing from ridges is effective for spotting animals using water sources and wash corridors. Plan around water—animals concentrate there during dry periods.
Early season offers better water distribution; late season demands water-source knowledge. This unit rewards patience, navigation skills, and willingness to cover ground on foot in genuinely wild desert country.