Driving the steep Andean road to Vallecitos ski resort in Mendoza
Vallecitos is a high-altitude ski resort and mountaineering hub located at 2,999 meters in the Cordon del Plata range of Mendoza, Argentina. The road to the resort is a classic Andean challenge, carved into the glacier-carved Valle del Plata. This is not a drive for the faint of heart; it is a relentless ascent on loose ripio (gravel) that punishes the vehicle's cooling system and tests the driver’s ability to manage traction on narrow, unprotected ledges where the mountain air starts to thin out rapidly.
| Road facts: Vallecitos & Lomas Blancas | |
|---|---|
| Location | Mendoza Province, Argentina |
| Resort Elevation | 2,999m (9,839ft) |
| Lomas Blancas Peak | 3,486m (11,437ft) |
| Distance (from Las Vegas) | 16.4 km (10.2 miles) |
What are the road conditions on the way to Vallecitos?
The 16.4-kilometer climb from Las Vegas is a constant struggle against the terrain. The surface is entirely unpaved, consisting of a mix of gravel and larger stones that have rolled down from the steep Andean slopes. As you gain elevation, the road features dozens of hairpin turns where the ground is often loose, making it easy for the wheels to spin if you don't maintain a steady pace. As seen on the ground, it is common to encounter vehicles with overheated engines on the shoulder; the combination of a steep gradient and the thinning air at 3,000 meters puts an extreme thermal load on the radiator and the transmission.
What mechanical precautions are needed for the Vallecitos climb?
Before heading into the Cordon del Plata, you must verify your vehicle's mechanical health. The most critical factor is the cooling system; crawling up the Andes in low gears means there is minimal airflow through the radiator, making it very easy to boil the engine. Check your tires and carry a full-sized spare, as the sharp Andean rocks can easily slice a sidewall. On the descent, do not ride the brake pedal. The sustained slope and the weight of the vehicle will glaze your pads in minutes. Use engine braking to control your speed on the hairpins. It is a high-altitude environment where the weather can shift from sun to a blizzard in an hour, so carry extra fuel and warm clothing, as help in these remote valleys is far from immediate.
How challenging is the 4x4 track to Lomas Blancas?
For those pushing beyond the resort, a minor unpaved track continues north, climbing to a staggering 3,486 meters at Lomas Blancas. This section is strictly for high-clearance 4x4 vehicles only. The road here is a vertical zigzag of dozens of tight hairpins where the track narrows to the width of a single vehicle. The "ripio" becomes deeper and more unstable, and the drop-offs into the glacial valley are hundreds of meters deep with zero protection. At this altitude, your engine will lose about 35% of its power, meaning you need to stay in low-range gears (4LO) to ensure you have enough torque to clear the steepest ramps without stalling.
Pic: Tere Cuccia