Quebrada del Yeso – San Juan Backcountry
Gypsum canyon gauntlet to high-altitude lakes
The Quebrada del Yeso track punches through San Juan’s most technical canyon terrain, where white gypsum walls tower overhead and the road surface changes from gravel to loose rock to sandy washes without warning. Starting near Iglesia, this route climbs relentlessly through increasingly narrow canyon walls before opening into the high puna where Laguna del Yeso reflects snow-capped peaks. Rock falls are common after storms, and the final approach to the lake requires careful line selection through boulder fields that’ll test both chassis clearance and driver patience.
This is proper difficult terrain demanding 4WD with low range, skid plates, and recovery gear—plus spare everything because help is 6 hours away minimum. Altitude hits hard above 3,500 meters, so acclimatize properly or risk altitude sickness. Best attempted March through May and September through November when snow clears but temperatures stay reasonable. Water sources exist but require purification. The reward is pristine high-altitude camping with vicuñas and flamingos for company, plus bragging rights on one of Argentina’s gnarliest backcountry routes.
Trail Specs
| Difficulty | Difficult |
|---|---|
| Trail Type | Technical 4x4 |
| Surface | Rock |
| Features | Camping, High Altitude, Remote, Scenic |
| Length (miles) | 47 mi / 76 km |
| Duration | 2-3 days |
| Max elevation (ft) | 13780 ft |
| Best season | March-May, September-November |
| Minimum vehicle | Modified 4WD with low-range |
| Nearest town | Iglesia, San Juan |
| Land manager | Provincial Government |
| Permit required | No |
| Cell service | None |
| Water crossings | Yes |
| 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
What's the minimum vehicle setup to run Quebrada del Yeso?
A modified 4WD with low-range, a lift, and all-terrain tires is the floor here — stock is not an option. Rocky canyon terrain with significant articulation demands and a 6,200 ft elevation gain means skid plates and a snorkel are strongly advised. A high-lift jack and recovery gear are non-negotiable on a 47-mile run with no rescue infrastructure.
When is Quebrada del Yeso actually passable?
March–May and September–November are the safe windows. Andean winter (June–August) brings snow and ice above 4,000 meters that makes the upper sections impassable. Summer (December–February) brings flash flood risk in the gypsum canyon — those walls funnel water fast and with zero warning.
Do you need a permit to drive this route in San Juan province?
No formal permit is required as of current information, but you must register with Argentine border gendarmería or local civil defense (Defensa Civil) in Iglesia before entering — this is standard practice for remote backcountry routes near the Chilean border zone. Carry your passport and vehicle documentation; military checkpoints are possible.
What's the hardest section and what makes it technical?
The lower canyon passage through the gypsum walls is the crux — fractured rock shelves, off-camber line choices, and loose scree make traction inconsistent and route-finding slow. Expect tight clearance between canyon walls in places, and the rocky climbs toward the high-altitude lakes demand careful throttle control in low-range. Plan for this section to take significantly longer than the mileage suggests.
Is there any water available on trail or do I carry everything for 2-3 days?
There are water crossings on the route and streams near the high-altitude lakes, but water sources in the lower gypsum canyon are unreliable and may be mineralized from the surrounding geology — treat or filter everything. Carry enough water to bridge dry stretches and always filter before drinking; there is zero cell service and no resupply between Iglesia and the end of the route.
Trail track
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