Lonesome Highway — Jemez Mountains High Road to Valles Caldera via Forest Road 376
Supervolcano rim road, elk, obsidian, solitude.
The Jemez Mountains of north-central New Mexico sit atop the Valles Caldera — a thirteen-mile-wide collapsed supervolcano that last blew 1.25 million years ago and still shapes everything you drive across up here. Forest Road 376 and its connectors out of La Cueva cut through the Santa Fe National Forest’s high backcountry, climbing from canyon juniper into dense ponderosa before breaking into the aspen-ringed meadows of the Jemez high country. The route skirts the caldera rim via the Redondo Peak bench, where elk herds the size of small ranches graze the open grassland and the volcanic rim towers against the sky. Key waypoints include the Banco Bonito obsidian flow, the East Fork Jemez River crossing, and the remote dispersed camping flats on the caldera’s northeast rim before the descent back toward Jemez Springs.
Moderate difficulty overall, but early-season mud and late-season snow can flip the script fast — this is mountain New Mexico, and weather moves in without notice. High-clearance 4WD handles it fine in dry conditions; lockers are helpful but not essential on the main route. No permit is required for the forest road portions, though Valles Caldera National Preserve charges a fee for entry onto preserve land proper. Best driven July through early October. Fuel and supplies in Jemez Springs or Cuba. Cell service disappears quickly once you leave pavement. Worth every mile for the volcanic geology alone.
Trail Specs
| Difficulty | Moderate |
|---|---|
| Trail Type | Backcountry, High Clearance, Overland Route |
| Surface | Dirt, Gravel, Mixed |
| Features | Camping, High Altitude, Remote, Scenic, Water Crossings |
| Length (miles) | 44 mi / 70.8 km |
| Duration | 1-2 days |
| Max elevation (ft) | 10500 ft |
| Best season | July-October |
| Minimum vehicle | Stock 4WD high-clearance |
| Nearest town | Jemez Springs, NM |
| Land manager | Santa Fe National Forest / Valles Caldera National Preserve |
| Permit required | No |
| Cell service | None |
| Water crossings | Yes |
| Dispersed camping | Yes |
| Official sources | USFS Santa Fe NF — Jemez Ranger District Valles Caldera National Preserve — NPS |
| Start coordinates | |
| End coordinates | |
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Location
Trail Conditions
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Frequently asked questions
Can a stock 4Runner or Wrangler handle FR 376 without modifications?
Yes — a stock 4WD high-clearance vehicle is the minimum and will handle this trail in dry conditions. Lifted rigs have more margin on the rougher sections and any water crossings, but bone-stock is workable if you're not pushing it.
When does the trail typically open and close for the season?
July through October is the reliable window. Snow closes FR 376 by late October or earlier depending on the year, and spring mud can make it impassable well into June. Call the Jemez Ranger District before an early or late season run.
Do you need a permit to drive FR 376 or enter Valles Caldera?
No permit is needed to drive FR 376 through Santa Fe National Forest. If you're entering Valles Caldera National Preserve itself, there's no vehicle fee but some activities inside the preserve require advance reservation through the NPS.
What's the hardest section and what should I actually expect?
The trail earns its moderate rating through sustained rough dirt and gravel at altitude, not one dramatic obstacle. The sections approaching the caldera rim can get rutted and loose, and afternoon thunderstorms above 10,000 ft in monsoon season (July–August) can turn surface conditions sketchy fast — lightning exposure is real up here.
How far is the nearest gas from the trailhead, and is there reliable water on route?
Jemez Springs has limited services and no guarantee of gas — fuel up in Bernalillo or Espanola before heading in. There are water crossings on route but treat everything before drinking; there are no developed water sources, and cell service is zero for the entire trail.
Trail track
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