Chimney Peak to Fish Creek Road — Southern Sierra Nevada Desert Transition Zone
Ancient sea floor, badlands, and deep desert sand.
Fish Creek Wash in Anza-Borrego Desert State Park is where the earth looks like it lost a fight with itself. The route follows the wash from Split Mountain Road south into the Fish Creek Mountains, threading between towering badland formations, past the wind caves carved into sandstone above the canyon floor, through the Elephant Trees Discovery Area, and eventually linking toward Harper Flat. Split Mountain itself is the marquee obstacle — a narrow gorge with boulder-strewn sandy floor that requires constant line selection. The geology here is world-class: you’re driving through ancient sea floor that tilted vertical, and the layered walls make that impossible to ignore.
Sand is the main enemy — aired-down tires are mandatory, and recovery gear including a shovel and traction boards should be standard kit. Stock 4WD trucks handle this with proper tire pressure management; low range and lockers help in the deeper wash sections. No permit required for day use, but camping within the park requires a reservation through Reserve California. Best season is November through March — summer temperatures in this canyon will kill you without exaggeration. Fuel in Ocotillo Wells before you drop in. Water: carry everything you need, bring more than you think.
Trail Specs
| Difficulty | Moderate |
|---|---|
| Trail Type | Backcountry, High Clearance, Technical 4x4 |
| Surface | Mixed, Rock, Sand |
| Features | Camping, Historic, Remote, Scenic |
| Length (miles) | 20 mi / 32.2 km |
| Duration | 1-2 days |
| Max elevation (ft) | 1800 ft |
| Best season | November-March |
| Minimum vehicle | Stock 4WD with aired-down tires |
| Nearest town | Ocotillo Wells, CA |
| Land manager | California Department of Parks and Recreation — Anza-Borrego Desert State Park |
| Permit required | No |
| Cell service | None |
| Water crossings | No |
| Dispersed camping | Yes |
| Official sources | parks.ca.gov |
| 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 this without modifications?
Yes, but you need to air down to 15-20 PSI — deep sand sections in Fish Creek Wash will swallow aired-up street tires. Stock ground clearance is fine; the rock sections are manageable, not technical enough to demand a lift.
When is this trail passable and what shuts it down?
November through March is the window — summer temps routinely hit 110°F+ and will cook you and your rig. Flash floods can blow out the wash crossings with zero warning after rain anywhere in the surrounding mountains, even on a clear day at your location.
Do I need a permit or is there a fee to run this trail?
Anza-Borrego Desert State Park has no vehicle permit required for the trail itself, but if you camp overnight you're in a state park — follow dispersed camping rules, stay on existing sites, and pack out everything. No fee booth, no day-use charge.
What's the hardest section and what should I actually be ready for?
The tightest technical moment is threading narrows in the wash where canyon walls close in and loose rocks demand slow, deliberate line choice. Bigger concern than any single obstacle is soft sand that can deepen after wind — momentum management matters more than flex here.
Is there any water or gas available on or near the trail, and what about cell service?
Zero cell service the entire route — plan accordingly and file a trip plan with someone before you go. Fuel up in Ocotillo Wells or El Centro; there's no gas between the trailhead and Fish Creek Road, and the nearest pump from the exit is a real drive. No water on trail — carry everything you need for the full run plus a day's emergency buffer.
Trail track
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