Mormon Rocks Fire Road
Technical granite ledges above the Cajon Pass.
Mormon Rocks Fire Road earned its reputation the hard way—multiple rocky ledges and off-camber sections that have claimed more than a few oil pans over the decades. This old fire access route climbs through chaparral-covered hills above Cajon Pass, offering glimpses of the ancient Mormon Rocks formation that gave early pioneers nightmares. The crux comes at Devil’s Backbone section around mile 6, where you’ll thread between massive granite outcroppings on a narrow shelf road that demands respect.
Solid intermediate difficulty requiring high-clearance 4WD with skid plates and recovery points—the granite here doesn’t forgive mistakes. Adventure Pass required for Angeles National Forest access. Best run spring through fall when fire restrictions aren’t in effect. Cell service is spotty but improves on the ridges. What you get is classic SoCal mountain wheeling just an hour from LA, plus access to some of the best dispersed camping in the San Gabriels. Pack extra water—the desert climate is deceptive up here.
Trail Specs
| Difficulty | Moderate |
|---|---|
| Trail Type | Technical 4x4 |
| Surface | Rock |
| Features | Camping, High Altitude, Scenic |
| Length (miles) | 15 mi / 24.1 km |
| Duration | Half day |
| Max elevation (ft) | 5800 ft |
| Best season | March-November |
| Minimum vehicle | High-clearance 4WD with skid plates |
| Nearest town | Cajon, CA |
| Land manager | Angeles National Forest |
| Permit required | Yes |
| Cell service | Spotty |
| Water crossings | No |
| Dispersed camping | Yes |
| 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 Jeep Wrangler handle the granite ledges on this trail?
Yes, but you'll need high clearance 4WD with skid plates minimum. The granite ledges are technical and will test your undercarriage protection.
Is Mormon Rocks Fire Road accessible in winter?
No, best season is March through November. Winter brings snow at higher elevations and the trail becomes impassable above 4,000 feet.
Do I need a permit to run Mormon Rocks Fire Road?
Yes, you need an Adventure Pass for Angeles National Forest. It's $5 daily or $30 annual and required for parking at trailheads.
What's the hardest section of the trail?
The granite ledge climbs around mile 8-10 are the crux. Expect steep, off-camber rock steps that require precise wheel placement and spotting.
Are there dispersed camping spots along the trail?
Yes, several established sites exist in the upper elevations with good views. Cell service is spotty, so download offline maps before heading up.