Ruta Provincial 40 – Salta High Andean Circuit

At 16,060 feet above sea level, Ruta Provincial 40 through Salta’s high Andean circuit will test your rig and your lungs in equal measure. This 186-mile overland route cuts through Argentina’s most unforgiving high-altitude desert, where volcanic peaks pierce endless salt flats and the air gets so thin your turbo diesel starts gasping for breath. The route connects San Antonio de los Cobres to the Chilean border through terrain that looks more like Mars than Earth, following ancient mining roads and llama tracks across the altiplano.

Your stock 4WD will handle the technical demands—mixed surfaces of gravel, sand, and broken volcanic rock—but altitude sickness and mechanical failures from thin air are the real killers here. The route climbs 8,200 feet from start to finish, crossing multiple water courses that can flash flood without warning during the October-March wet season. Smart overlanders run this circuit between April and October when the weather stays predictable and the stream crossings remain manageable. Fuel up in San Antonio de los Cobres because there’s nothing for the next 300 kilometers except condors and mining ghosts. Cell service vanishes the moment you leave town.

The landscape shifts from high desert scrub to lunar salt flats to snow-capped volcanic moonscape as you gain elevation. Dispersed camping is permitted throughout, but pick your spots carefully—nighttime temperatures can drop below freezing even in summer at this elevation. Water crossings are frequent but typically shallow, though spring snowmelt can turn docile streams into raging torrents overnight. The route demands 2-3 days minimum, not because of technical difficulty but because of the sheer distance and the need to acclimate as you climb.

This isn’t a trail for Instagram heroes or weekend warriors. Ruta Provincial 40 delivers raw Andean solitude in landscape so alien it rewires your brain. You’ll cross terrain where the Inca once hauled gold and silver, where modern miners still scratch livings from impossible elevations, where the horizon stretches unbroken to snow peaks that scrape the sky. Bring extra fuel, spare parts, and altitude sickness medication. The payoff is Argentina’s most remote overland experience, where you can camp for days without seeing another human soul under stars so bright they cast shadows.

Q: What vehicle do I need for Ruta Provincial 40?

A stock 4WD with high clearance handles the route fine, but altitude affects engine performance above 12,000 feet so turbo diesels perform better than naturally aspirated engines.

Q: When is the best time to drive this route?

April through October offers the most stable weather and manageable water crossings, avoiding the December-March wet season when flash floods turn streams dangerous.

Q: How long does the route take?

Plan 2-3 days minimum for the full 186-mile circuit, allowing time for altitude acclimation and the inevitable mechanical issues that come with extreme elevation.

Q: Is there fuel available along the route?

No fuel exists for 300 kilometers after San Antonio de los Cobres, so carry extra jerry cans and calculate consumption carefully for the thin-air conditions.

Q: What’s the biggest challenge on this trail?

Altitude is the main enemy—at 16,060 feet maximum elevation, both drivers and vehicles struggle with oxygen deprivation more than any technical driving obstacle.