Ruta Provincial 307 – Laguna del Diamante Circuit
Volcanic moonscape to pristine Andean lake
The drive to Laguna del Diamante cuts through some of Mendoza’s most alien terrain, where ancient lava flows create a moonscape punctuated by guanaco herds and condor thermals. This remote circuit climbs from 1,200 meters to over 3,200 meters, threading through volcanic valleys and crossing multiple stream beds before revealing the turquoise waters of Laguna del Diamante, backdropped by the imposing mass of Volcán Maipo. The final approach requires navigating loose volcanic scree and rocky outcrops that’ll test your line choice.
This is legitimate high-altitude overlanding that demands a capable 4WD with good ground clearance and reliable cooling systems. Weather changes fast above 3,000 meters, so pack winter gear even in summer. October through April offers the best access, though snow can close the upper sections without warning. No permits required, but fuel up in San Carlos – it’s a long way back. The payoff is camping beside one of Argentina’s most pristine alpine lakes with zero light pollution and the kind of silence that makes city folk nervous.
Trail Specs
| Difficulty | Moderate |
|---|---|
| Trail Type | Overland Route |
| Surface | Mixed |
| Features | Camping, High Altitude, Remote, Scenic |
| Length (miles) | 68 mi / 109.4 km |
| Duration | 2 days |
| Max elevation (ft) | 10500 ft |
| Best season | October-April |
| Minimum vehicle | Stock 4WD high-clearance |
| Nearest town | San Carlos, Mendoza |
| Land manager | Mendoza Parks Administration |
| Permit required | No |
| Cell service | None |
| Water crossings | Yes |
| Dispersed camping | Yes |
| Start coordinates | |
| End coordinates | |
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Location
Trail Conditions
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Frequently asked questions
Can a stock 4WD high-clearance vehicle handle this route, or do I need a lift?
A stock high-clearance 4WD like a Land Cruiser 70, Hilux, or equivalent is the minimum — unlocked sedans and crossovers will not make it. The volcanic lava rock sections and river crossings demand real clearance and low-range. Lifted builds aren't required but give you more margin on the rocky descents.
When is Ruta Provincial 307 actually drivable?
October through April is the reliable window. Snow closes the high sections in winter (May–September), and even within the open season, a late storm can shut the route fast — check with local authorities in San Carlos before departure. Early November can still have snow patches above 9,000 feet.
Do I need a permit to drive the Laguna del Diamante circuit?
Yes — access to the Laguna del Diamante reserve requires a permit issued by the Mendoza Parks Administration. Get it in advance through their office or the relevant Mendoza provincial authority; rangers do check at the control gate on the route.
What's the hardest section and what should I actually expect?
The roughest stretch is crossing the ancient lava fields and the riverbeds approaching the lake — loose volcanic rock, no clear line, and corrugated sections that punish your gear and your fillings. Nothing is technically extreme at moderate speeds, but the combination of altitude (up to 10,500 ft), remoteness, and repeated technical terrain keeps you honest for two full days.
There's zero cell service — how do I plan water and fuel for 109 km of high Andean circuit?
Fuel up completely in San Carlos before you leave; there are no stations on route. Water crossings exist but treat everything before drinking — a filter or purification tablets are non-negotiable at this altitude. Dispersed camping is allowed, so carry enough food and water for the full two days plus a buffer day in case weather pins you down.
Trail track
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