- Region
- AZ, USA
- Country
- United States
- Best for
- hiking
- Best season
- Spring, Summer
- Permits
- Confirm current permit requirements, campi…
- Managed by
- U.S. Fish and Wildlife Service, Kofa National Wildlife Refuge
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Kofa Wilderness trip tools
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Photos of Kofa Wilderness
How to get there
Kofa lies east of U.S. Highway 95 between Yuma and Quartzsite. Entrances include King Valley, Palm Canyon, and Crystal Hill; Crystal Hill is the northernmost entrance, 10 miles south of Quartzsite. The southernmost entrance road is about 40 miles north of Yuma and leads toward the southern Castle Dome Mountains. Vicksburg Road off Interstate 10 provides access to the refuge's northeast corner. The refuge office is at 9300 E. 28th Street in Yuma, separate from the wilderness approaches. Confirm road conditions and vehicle suitability before leaving the highway.
- Palm Canyon
One of the popular refuge entrances east of U.S. Highway 95. Confirm the approach and current road conditions before using it as the starting point for a walking outing.
- King Valley
A popular entrance serving the broad valley between the Kofa Mountains to the north and Castle Dome Mountains to the south.
- Crystal Hill
The northernmost refuge entrance, located 10 miles south of Quartzsite.
- Vicksburg Road
Access from Interstate 10 to the northeast corner of the refuge. Fuel is available at Interstate 10 and Vicksburg Road, Exit 45.
Sources: fws.gov · University of Montana / federal agency partners · Wilderness Connect / federal wilderness boundary inventory · Wikipedia. Confirm road and trailhead conditions with the managing agency before you leave.
AZ, USA · United States
- Fishing
- Mountaineering
- Desert Hiking
- Canyoneering
- Hiking
- Wildlife Viewing
Two mountain ranges and a broad desert valley
Kofa Wilderness occupies more than 80 percent of Kofa National Wildlife Refuge in southwestern Arizona, between Yuma and Quartzsite. The Kofa Mountains rise in the north, the Castle Dome Mountains in the south, and King Valley separates them. Broad, gently sloping foothills give way to jagged peaks standing thousands of feet above the desert floor. This is a destination for self-sufficient desert exploration rather than a trip built around visitor facilities. Old mining roads connect parts of the surrounding refuge, but road access and wilderness travel are different things: motor vehicles and mechanical transport are generally prohibited within wilderness. Plan an approach on designated roads, then explore on foot where appropriate. The scale of the country makes a focused visit to one area more practical than trying to cover both mountain ranges in a single outing.
A wilderness shaped by wildlife conservation
Kofa National Wildlife Refuge was established in 1939 to protect desert bighorn sheep, and conserving sheep and their habitat remains a central management purpose. The landscape also supports endangered Sonoran pronghorn, California fan palms, and the rare Kofa Mountain barberry. Smaller mammals include badgers, foxes, ground squirrels, pocket mice, and kangaroo rats; many forage at night when temperatures are cooler. Watch for animal signs without approaching burrows or crowding wildlife at water. Concrete dams, windmills, and modified water sources are part of this wilderness's conservation history. Some structures have deteriorated, while others remain maintained for wildlife. Their presence should not be taken as assurance of drinking water for hikers. Carry the water needed for the outing, and give animals room to reach the small, scattered waterholes.
Season, access, and self-sufficiency
Most visitors come between October and March, while the hot summer months see very little human activity. Cooler-season travel is the more practical starting point for a hiking plan, though desert conditions still call for water, sun protection, and attention to the forecast. There are no visitor facilities on the refuge. Yuma and Quartzsite provide nearby restaurants, motels, and fuel; fuel is also available at Interstate 10 and Vicksburg Road. Four-wheel drive is necessary for exploring the refuge's road network, and some remote sections require three to four hours of driving from the highway. Do not apply that estimate to every entrance. Choose an objective that leaves time for the return drive, and confirm current access conditions and any permit requirements with the U.S. Fish and Wildlife Service. Expect occasional wildlife-survey aircraft or military overflights even away from roads.
Where on earth
Satellite imagery flying in from a world view to Kofa Wilderness, United States. Use the + / − buttons, or click the map to zoom with your scroll wheel; drag to pan and pinch to zoom on touch.
Coordinates
- Decimal degrees
- 33.3406, -114.0853
- Latitude (DMS)
- 33° 20′ 26.0″ N
- Longitude (DMS)
- 114° 5′ 7.2″ W
Coordinates are an access-point reference for Kofa Wilderness, not a route. Carry a paper map and confirm trailhead or put-in access with the managing agency before you go.
Topic summary
In the early part of the 1900s the King of Arizona (KofA) Mine scoured this land for precious mineral deposits. Today, in a twist of fate, the Kofa National Wildlife Refuge and subsequently Kofa Wilderness...
Key takeaways
- Region: AZ, USA
- Country: United States
- Good for: hiking
- Coordinates: 33.341, -114.085
Intended uses
hiking
Keep planning
Popular pursuits at Kofa Wilderness
- Fishing
Resident gamefish, seasons, and the water that holds them.
- Mountaineering
Glacier and high-route objectives with real consequence.
- Desert Hiking
Water carries and heat management drive the plan.
- Canyoneering
Narrows, downclimbs, and flash-flood timing.
- Hiking
Day miles on marked trail, with route notes and trail links below.
- Wildlife Viewing
Best light, best season, and where animals move.
Animals around Kofa Wilderness
Two mountain ranges and a broad desert valley
Kofa Wilderness occupies more than 80 percent of Kofa National Wildlife Refuge in southwestern Arizona, between Yuma and Quartzsite. The Kofa Mountains rise in the north, the Castle Dome Mountains in the south, and King Valley separates them. Broad, gently sloping foothills give way to jagged peaks standing thousands of feet above the desert floor. This is a destination for self-sufficient desert exploration rather than a trip built around visitor facilities. Old mining roads connect parts of the surrounding refuge, but road access and wilderness travel are different things: motor vehicles and mechanical transport are generally prohibited within wilderness. Plan an approach on designated roads, then explore on foot where appropriate. The scale of the country makes a focused visit to one area more practical than trying to cover both mountain ranges in a single outing.
A wilderness shaped by wildlife conservation
Kofa National Wildlife Refuge was established in 1939 to protect desert bighorn sheep, and conserving sheep and their habitat remains a central management purpose. The landscape also supports endangered Sonoran pronghorn, California fan palms, and the rare Kofa Mountain barberry. Smaller mammals include badgers, foxes, ground squirrels, pocket mice, and kangaroo rats; many forage at night when temperatures are cooler. Watch for animal signs without approaching burrows or crowding wildlife at water. Concrete dams, windmills, and modified water sources are part of this wilderness's conservation history. Some structures have deteriorated, while others remain maintained for wildlife. Their presence should not be taken as assurance of drinking water for hikers. Carry the water needed for the outing, and give animals room to reach the small, scattered waterholes.
Season, access, and self-sufficiency
Most visitors come between October and March, while the hot summer months see very little human activity. Cooler-season travel is the more practical starting point for a hiking plan, though desert conditions still call for water, sun protection, and attention to the forecast. There are no visitor facilities on the refuge. Yuma and Quartzsite provide nearby restaurants, motels, and fuel; fuel is also available at Interstate 10 and Vicksburg Road. Four-wheel drive is necessary for exploring the refuge's road network, and some remote sections require three to four hours of driving from the highway. Do not apply that estimate to every entrance. Choose an objective that leaves time for the return drive, and confirm current access conditions and any permit requirements with the U.S. Fish and Wildlife Service. Expect occasional wildlife-survey aircraft or military overflights even away from roads.
Route options
- King Valley exploration
Use the King Valley entrance for an outing focused on the desert floor between the two mountain ranges. This is an area-based option, not a defined trail itinerary; establish a walking route and turnaround point with appropriate mapping before setting out.
- Southern Castle Dome Mountains approach
Approach the southern Castle Dome Mountains via the southernmost refuge entrance road, about 40 miles north of Yuma. Plan road travel and any on-foot exploration separately, keeping vehicles outside wilderness and on designated roads.
- Refuge road-network exploration
Old mining-era roads connect areas of the refuge, allowing north–south or east–west exploration by four-wheel-drive vehicle on designated roads. This is a refuge driving option rather than a route through the wilderness itself. Some remote sections take three to four hours to reach from the highway; confirm the intended roads and conditions before committing.
Sample itineraries
- Palm Canyon introductory day · 1 day
Use the Palm Canyon entrance for a day exploring the Kofa Mountains landscape on foot. Confirm road conditions and permitted vehicle access before leaving. Keep the outing within your navigation ability and water supply; there are no visitor facilities on the refuge.
- King Valley and Castle Dome Mountains · 2 days
Spend one day exploring King Valley and another approaching the southern Castle Dome Mountains. Treat these as separate day outings, with lodging in Yuma or Quartzsite. Allow substantial time for rough-road travel, confirm designated vehicle routes, and carry everything needed for each day.
Seasonal conditions
Spring
March; later spring guided by forecasts
March falls within the main October–March visitation period. Plan desert outings around forecast temperatures, carry your own water, and shorten walks as conditions warm.
Summer
Hot summer months
Heat leaves the refuge nearly empty of visitors. Remote travel and a lack of visitor facilities make conservative plans important. Avoid strenuous outings in hot conditions and do not depend on wildlife water sources.
Fall
October onward
The main visitation period begins in October. Use current temperatures rather than the calendar to set hiking plans. Visitors tend to remain near designated roads, while the backcountry remains remote.
Winter
Winter portion of October–March
Winter brings many visitors to southern Arizona and Kofa. Most stay on or near designated roads. Carry layers, check forecasts, and remain self-sufficient even when other visitors are nearby.
| Season | Window | Conditions |
|---|---|---|
| Spring | March; later spring guided by forecasts | March falls within the main October–March visitation period. Plan desert outings around forecast temperatures, carry your own water, and shorten walks as conditions warm. |
| Summer | Hot summer months | Heat leaves the refuge nearly empty of visitors. Remote travel and a lack of visitor facilities make conservative plans important. Avoid strenuous outings in hot conditions and do not depend on wildlife water sources. |
| Fall | October onward | The main visitation period begins in October. Use current temperatures rather than the calendar to set hiking plans. Visitors tend to remain near designated roads, while the backcountry remains remote. |
| Winter | Winter portion of October–March | Winter brings many visitors to southern Arizona and Kofa. Most stay on or near designated roads. Carry layers, check forecasts, and remain self-sufficient even when other visitors are nearby. |
Permits, fees & closures
Confirm current permit requirements, camping rules, and vehicle-access restrictions with the U.S. Fish and Wildlife Service at Kofa National Wildlife Refuge.
Official source: Kofa National Wildlife Refuge · Verified November 1, 2026
Hazards & regulations
- Summer heat can make desert travel unsafe. Keep exertion conservative and carry sufficient drinking water.
- Waterholes are small and widely scattered; maintained water structures serve wildlife. Do not plan your drinking supply around them.
- Remote roads require four-wheel drive, and some areas take 3–4 hours to reach from the highway. Confirm conditions and prepare for vehicle trouble.
- Jagged mountains and rugged terrain demand careful footing and navigation. Choose outings that match your skills.
- There are no visitor facilities on the refuge. Remoteness makes forgotten supplies or an unplanned delay more consequential.
What to pack for Kofa Wilderness
- Drinking water for the full outing and an unexpected delay
- Sun hat, sunscreen, and sun-protective clothing
- Food and extra snacks
- Layers suited to the forecast
- Map showing wilderness boundaries and designated roads
- Offline navigation and backup power
- First-aid kit
- Emergency communication device
- Vehicle recovery equipment and serviceable spare tire
- Extra vehicle water and adequate fuel
- Sturdy footwear
- Binoculars for observing wildlife without approaching
Kofa Wilderness FAQ
- Where is Kofa Wilderness?
- It lies within Kofa National Wildlife Refuge between Yuma and Quartzsite, Arizona, east of U.S. Highway 95. The Kofa Mountains rise north of King Valley, and the Castle Dome Mountains lie to the south.
- Which entrances serve the area?
- Named entrances include King Valley, Palm Canyon, and Crystal Hill. The southernmost entrance leads toward the southern Castle Dome Mountains. Vicksburg Road off Interstate 10 provides access to the refuge's northeast corner. Confirm road conditions and wilderness boundaries before choosing an approach.
- Can vehicles travel through the wilderness?
- Motor vehicles and mechanical transport, including bicycles, are generally prohibited within wilderness. Refuge road access is distinct from wilderness access: use designated vehicle routes and verify boundaries. Four-wheel drive is essential for the refuge's rough-road travel.
- Where are supplies and lodging available?
- There are no visitor facilities on the refuge. Restaurants and motels are in Yuma and Quartzsite. Fuel is available in those towns and at Interstate 10 and Vicksburg Road. Stock up before entering.
- Why are there dams and windmills in wilderness?
- These structures support desert wildlife water needs. Some older installations have been allowed to deteriorate, while others remain maintained. Give wildlife room around water sources and carry your own drinking water.
- Will the backcountry be quiet?
- Kofa offers extensive remote country, but aircraft noise is possible. Refuge wildlife surveys involve aerial overflights, and military jets and helicopters may also pass overhead.