There’s something almost humbling about driving west from Mendoza as the flat vineyards slowly give way to the first foothills of the Andes. I remember my first time on RN7 vividly—the moment the road starts climbing and you realise the sky has somehow grown bigger, that’s when you know this isn’t just another scenic drive. The route to Uspallata and onwards to Aconcagua Provincial Park is arguably one of the most spectacular mountain roads in South America, and it’s all waiting right here on your doorstep from Mendoza.
Route Overview
This full-day drive along RN7 covers approximately 200 kilometres return, taking you from Mendoza’s wine country straight into the heart of the Andes. Weaving through the Uco Valley before ascending into the high mountain passes, you’ll pass historic mining towns, natural hot springs, and some of the most dramatic scenery this side of the continent. The road reaches altitudes of over 3,000 metres at the park viewpoints, so the air definitely thins out up here.
Key stops along the way:
- Uspallata – a historic mountain town with old colonial charm
- Puente del Inca – natural thermal springs and striking geological formations
- Aconcagua Provincial Park (Horcones) – the main viewpoint for Aconcagua, the highest peak in the Americas
- Los Penitentes – a ski resort village and rest stop
- Polvaredas – spectacular high-altitude viewpoints
Driving time: Around 3–4.5 hours each way depending on stops, so budget 6–9 hours total for the return journey. I’d suggest leaving Mendoza by 7am at the latest to catch the morning light on the peaks and give yourself plenty of time before the afternoon winds pick up. The road is generally in good condition, though some sections near the passes can be rough. If you’re planning this as a day trip from Mendoza, picking up a rental car makes all the difference for flexibility—you can check available vehicles in Mendoza and head out on your own schedule rather than being tied to tour times.
Local tip: The weather in the Andes can switch from brilliant sunshine to snow flurries within an hour, even in summer. Always keep a layer within reach and check the forecast before heading up. December through February offers the most reliable conditions, though summer afternoons often bring strong winds that can make the high passes uncomfortable.
This Trip Has Some Traps You Should Know About
Altitude sickness: Reaching 3,000+ metres at the park viewpoints is no joke. I felt perfectly fine in Uspallata (around 1,900m) but started noticing the thin air once we climbed higher. Give yourself time to acclimatise, stay hydrated, and don’t overexert yourself with long hikes on arrival. If you’ve come straight from sea level, consider spending a night in Uspallata before pushing up to the park.
Road conditions near Horcones: The final stretch into Aconcagua Provincial Park is gravel and can be rutted after rain. Standard hire cars manage fine, but take it slow on this section—there’s no point rushing and damaging your suspension. The road is also narrow in places with limited passing opportunities, so factor in extra time for slower vehicles ahead.
Afternoon weather: I learned this the hard way—heading up after 2pm in summer often means encountering strong gusts that make stopping for photos genuinely dangerous. By mid-afternoon, clouds typically roll in fast, obscuring the peaks. The payoff for an early start is those crystal-clear morning views of Aconcagua with zero wind and perfect reflections in the mountain pools.
Limited facilities: Once you leave Uspallata, options for food and fuel become scarce. There’s a petrol station in Los Penitentes and basic snacks at the park entrance, but don’t rely on finding anything substantial until you’re back in Uspallata. I always pack water, snacks, and a thermos of coffee—essential for a long day at altitude.
Practical Tips Before You Go
Documents: Keep your passport to hand—you’ll pass through Argentine immigration checkpoints on this route. Your driving licence should be valid in Argentina, though an International Driving Permit is recommended. Always have your car hire agreement accessible as well.
What to wear: Layers are absolutely essential. Even in summer, temperatures at the viewpoints hover around 10–15°C, and the wind chill can make it feel colder. I suggest a warm fleece, waterproof jacket, sturdy walking shoes, and sun protection—the UV at altitude is significantly stronger than at sea level. A hat and sunglasses are non-negotiable.
Vehicle kit: A fully charged phone with offline maps downloaded (signal is patchy at best in the mountains), a car phone mount, portable charger, basic emergency kit, and more water than you think you’ll need. The drive is spectacular but remote—being prepared for the unexpected is just sensible.
Local tip: If you’re hiring a car, opt for something with decent ground clearance. The approach roads near Horcones can be rough after wet weather, and a higher vehicle will handle the terrain much better than a low-slung sedan.
FAQ
Is it possible to visit Aconcagua Provincial Park without a tour?
Yes, absolutely. The park is accessible by road, and if you have your own vehicle you can drive to the main viewpoint at Horcones independently. Tours are available from Mendoza, but having your own wheels gives you complete flexibility to stop whenever you please. Renting a car in Mendoza is straightforward, and it’s well worth the freedom for a route like this.
Can I hike inside Aconcagua Provincial Park?
The main Horcones viewpoint is accessible without a permit and offers stunning views of the mountain. For longer treks into the park’s interior, you’ll need to obtain permits and pay park fees, which are managed separately. Day visitors staying at the viewpoints don’t need advance permits, but always check current regulations before visiting.
What’s the best time of year to do this drive?
November through March offers the most reliable weather, with December to February being peak season. Summer months bring warmer temperatures but also afternoon winds and occasional thunderstorms. Winter (June to September) can see road closures due to snow, and many facilities are shut.
Are there places to eat along the route?
Options are limited once you’re past Uspallata. Los Penitentes has a couple of basic restaurants and snack bars, but I’d recommend having a proper meal in Uspallata before continuing to the park. The food options in Uspallata itself are simple but hearty—perfect fuel for a day in the mountains.
How dangerous is the altitude for ordinary tourists?
Altitude sickness can affect anyone regardless of fitness, and symptoms at 3,000m can range from mild headache and fatigue to more serious breathing difficulties. The key is to ascend gradually, drink plenty of water, and listen to your body. Most healthy adults adjust within a day or two, but if you’ve just flown into Mendoza from sea level, give yourself at least one night to adjust before attempting the full drive.
Final Thoughts
The Mendoza to Uspallata and Aconcagua Provincial Park route is one of those drives that stays with you long after you’ve returned to the wine region below. The scale of the Andes hits you differently when you’re actually behind the wheel, watching the road climb steadily into those enormous skies. It’s a landscape that genuinely makes you feel small in the best possible way.
The缺点 is that this isn’t really a relaxed sightseeing route—the driving is demanding and the altitude is relentless. But if you’re willing to wake up early and put in the miles, the rewards are absolutely worth it. Just remember to take your time, stay hydrated, and don’t try to rush back to Mendoza in the evening. The mountains aren’t going anywhere, and there’s something rather wonderful about watching the last light fade over Aconcagua before you begin the descent.