Zuni Mountains Loop — Cibola National Forest High Road via Oso Ridge and Agua Fria
Sky island loop above the Rio Puerco that nobody runs.
The Zuni Mountains rise as a broad, forested uplift west of Albuquerque between I-40 and the Navajo Nation boundary — old volcanic country that most overlanders drive past at 75 mph without a second glance. Push south off I-40 at Thoreau or Grants and climb into Cibola National Forest on FR 49 toward Oso Ridge. The loop threads through ponderosa pine stands that were selectively logged a century ago, past the ruins of the McGaffey Civilian Conservation Corps camp, and along mesa edges where the land drops away into the Rio Puerco basin 3,000 feet below. The Agua Fria section on the south side is the gnarlier half — loose volcanic rock, tight switchbacks, and wash crossings that drain badly in monsoon season.
Moderate difficulty for a stock 4WD, but monsoon season (July through September) can make the clay-over-rock sections genuinely treacherous. Best time to run this loop is May through June before the rains, or October when the aspens go gold on the upper benches. The nearest fuel is Grants to the east or Gallup to the west — top off either way. No permit needed, and dispersed camping is available throughout the forest. Cell service exists near the I-40 approaches and vanishes completely on the back half. This is a quiet, competent loop — not dramatic, just genuinely good New Mexico backcountry.
Trail Specs
| Difficulty | Moderate |
|---|---|
| Trail Type | Backcountry, High Clearance, Overland Route |
| Surface | Dirt, Gravel, Rock |
| Features | Camping, High Altitude, Historic, Remote, Scenic |
| Length (miles) | 55 mi / 88.5 km |
| Duration | 1-2 days |
| Max elevation (ft) | 8200 ft |
| Best season | May-June, October |
| Minimum vehicle | High-clearance 4WD |
| Nearest town | Grants, NM |
| Land manager | Cibola National Forest — Mt. Taylor Ranger District |
| Permit required | No |
| Cell service | Spotty |
| Water crossings | Yes |
| Dispersed camping | Yes |
| Official sources | fs.usda.gov |
| Start coordinates | |
| End coordinates | |
| Copy both for Google Maps directionsClick to copy the directions URL · or open it directly in a new tab | |
| Find on Google | Search on Google → |
Location
Trail Conditions
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Frequently asked questions
Can a stock Tacoma or 4Runner handle the Zuni Mountains Loop, or does it need a lift?
Stock high-clearance 4WD rigs like a Tacoma or 4Runner handle this fine. The old logging grades and rocky sections are moderate — nothing requires a lift, but low-clearance crossovers and stock 2WD trucks will struggle on the rougher volcanic rock sections near Oso Ridge.
When does the trail typically open after winter, and is it runnable in fall?
May through June is the sweet spot once winter mud dries out at 8,200 feet — snow can linger into April on the north-facing slopes. October is excellent: aspen color, cool temps, minimal traffic. Avoid monsoon season (July–August) when the dirt grades turn greasy and flash flooding is a real risk in the lower sections.
Do I need a permit or pay any fees to run this loop?
No permit required and no fee — it's dispersed Cibola National Forest land managed by the Mt. Taylor Ranger District. Standard forest rules apply: pack it in, pack it out, campfires subject to current fire restrictions, which in New Mexico can change fast, so check with the ranger district before you go.
What's the hardest section of the loop and what should I actually expect?
The stretch along Oso Ridge is the most technical — narrow shelf road sections with loose rock and some exposure on the mesa edge. Nothing that'll make your palms sweat if you've done moderate trails before, but it demands attention and you won't want to meet another rig going the opposite direction on the tightest parts.
Is there reliable water along the route, and how far is the nearest fuel from the trailhead?
Do not count on the water crossings for drinking water without a solid filter — treat everything. Grants, NM is your last guaranteed fuel and supply stop before the loop; fill up there, it's roughly 20–25 miles from the start and there's nothing on-route. Cell service is spotty at best across the whole loop, so download offline maps and file a trip plan before you leave.
Trail track
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