Cottonwood Wash Road — San Rafael Reef to Sinbad Country via Temple Mountain
Uranium ghost camps and sandstone silence.
Temple Mountain sits at the heart of one of the most underrated overlanding zones in Utah — the inner Sinbad country of the San Rafael Swell. The Cottonwood Wash Road enters the reef via a crack in the sandstone that barely looks passable, then drops into the wash itself where the track alternates between firm sand and axle-deep loose stuff depending on recent weather. Old uranium mine tailings mark the mid-route waypoints at Temple Mountain, where Cold War-era prospecting camps still haunt the benches above the wash. Beyond Temple Mountain the canyon opens into the Sinbad basin, a broad isolated interior valley ringed by the Swell’s signature tilted reef fins — one of the more dramatic natural theaters in the Colorado Plateau and rarely visited even by Utah standards.
Moderate difficulty overall, but the wash sections after any rain will swallow a two-wheel-drive vehicle permanently — treat it as a high-clearance job year-round. The sand can also be deceptively soft in the lower canyon; airing down to 18–20 psi helps considerably. Closest fuel and water are in Green River, roughly 25 miles north. No permit required; BLM-managed. Dispersed camping throughout Sinbad is wide open and genuinely remote — you may run two days here without seeing another vehicle. Best seasons are spring and fall; flash flood risk in summer thunderstorm season is real and not worth testing.
Trail Specs
| Difficulty | Moderate |
|---|---|
| Trail Type | Backcountry, High Clearance, Overland Route |
| Surface | Mixed, Rock, Sand |
| Features | Camping, Historic, Remote, Scenic |
| Length (miles) | 34 mi / 54.7 km |
| Duration | 1-2 days |
| Max elevation (ft) | 6200 ft |
| Best season | March-May, September-November |
| Minimum vehicle | High-clearance 4WD |
| Nearest town | Green River, Utah |
| Land manager | Bureau of Land Management — Price Field Office |
| Permit required | No |
| Cell service | None |
| Water crossings | Yes |
| Dispersed camping | Yes |
| Official sources | blm.gov |
| Start coordinates | |
| End coordinates | |
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Location
Trail Conditions
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Frequently asked questions
Can a stock Tacoma or 4Runner handle Cottonwood Wash Road, or does it need a lift?
A stock high-clearance 4WD like a Tacoma or 4Runner can manage this trail, but low-range is required on the rockier sections near Temple Mountain. A lift helps on the sandier wash sections where belly clearance matters, but it's not a dealbreaker. Two-wheel-drive and crossovers are out.
When is Cottonwood Wash Road actually passable — and what kills access?
March through May and September through November are the sweet spots. Summer flash floods can turn the wash into a trap with zero warning, and winter snow and ice at elevation make it a no-go. Check rainfall forecasts for the entire region, not just the trailhead — upstream storms hit hard down here.
Do you need a permit to run this trail or camp along it?
No permit required as of now — it's BLM land managed by the Price Field Office. Dispersed camping is allowed under standard BLM rules: 14-day stay limit, 200 feet from water sources and roads. No fees.
What's the hardest section and what should I actually expect?
The stretch through the San Rafael Reef near the start is the most technical — broken sandstone ledges and loose rock that demand careful line selection. It's not extreme, but one bad line can hang a skid plate or stuff a front tire into a crack. Take it slow and walk it first if you're unsure.
Are the water crossings in Cottonwood Wash actually drive-through or do they stop rigs?
Crossings are typically shallow and passable in normal conditions, but wash depth changes fast after rain — what's ankle-deep in the morning can be axle-deep by afternoon. There's no cell service on this entire route, so if you get caught out, you're solving it yourself. Carry a recovery kit and check weather hard before you drop in.
Trail track
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