Salta To Cachi Via Cuesta Del Obispo & Los Cardones (RN33/RP42)
There’s something about leaving Salta in the early morning when the Lerma Valley is still shrouded in mist that makes the whole journey feel like driving into another world. Within an hour, you ascend from subtropical gardens to a landscape that wouldn’t look out of place on the Tibetan plateau – all burnt ochre plains, razor-thin roads, and ancient cacti standing sentinel in the silence. If you’ve ever wondered what a colonial road trip through the Argentine highlands actually feels like, this route via the Cuesta del Obispo and Parque Nacional Los Cardones is the answer.
The road climbs relentlessly through hairpin bends, rewarding you with viewpoints that make you want to pull over every five minutes. We found ourselves stopping far more often than we planned, not because we had to, but because the landscape demanded it. By the time you reach the flat puna plateau and the straight stretch through Los Cardones, with its forest of towering cardón cacti, you’ll understand why this is considered one of Argentina’s most spectacular drives.
Route Overview
Driving time: Approximately 3 hours 30 minutes to 4 hours 30 minutes (one way)
Total distance: Around 180 kilometres via RN33 and RP42
Best season: Spring and autumn for stable weather; summer brings afternoon thunderstorms
Route type: High-altitude mountain pass with national park scenery
Recommended vehicle: A 4WD is ideal for the unpaved sections and provides better control on the winding descents
Stops in order:
- San Lorenzo – A small town on the valley’s edge, perfect for a coffee stop before the climb
- Cuesta del Obispo viewpoint – The dramatic first ascent with sweeping valley views
- Piedra del Molino – A key rest point at altitude with basic facilities
- Parque Nacional Los Cardones – The cactus-studded plateau and heart of the journey
- Cachi – The charming colonial destination backed by the Nevado de Cachi range
The route is sequenced so you build towards the most spectacular scenery. Starting at San Lorenzo gives you time to acclimatise before the serious altitude hits at Piedra del Molino (around 3,400 metres). We suggest budgeting extra time for photography stops – the light on the Cuesta del Obispo in late afternoon is particularly special, though this means you’ll arrive at Cachi in the evening, which has its own romantic appeal.
If you’re planning to explore beyond Cachi or return to Salta the same day, renting a car in Salta makes all the difference. Having your own vehicle means you can leave at dawn to catch the best light, stop whenever the view demands it, and take detours to those hidden roadside stalls selling local preserves. Browse available vehicles in Salta to find something suited to mountain driving.
Insider tip: Fill up with fuel in Salta before departing. The last proper petrol station before the route’s high-altitude sections is in San Lorenzo, and prices climb significantly once you’re in remote areas.
What to Know Before You Go
The Cuesta del Obispo is not a technically difficult drive, but it demands respect. The first section involves steep descents on narrow roads with minimal barriers – if you’re not comfortable with mountain driving, take it slowly and use the viewpoint pull-outs to let faster traffic pass.
Altitude considerations: The route climbs to over 3,400 metres at Piedra del Molino. Altitude sickness can affect anyone, regardless of fitness. Symptoms typically include headache, shortness of breath, and fatigue. We recommend spending at least 24 hours in Salta (at 1,200 metres) before attempting this drive, and avoid the route if you’re feeling unwell. Drink plenty of water and keep the car well-ventilated.
Road conditions: The RN33 is mostly paved but deteriorated in sections. The RP42 from Piedra del Molino to Cachi includes rough patches and unpaved portions, especially after rain. During the wet season (December to March), flash floods can temporarily close roads – always check current conditions before setting out.
Wildlife alert: The puna plateau is home to guanacos, foxes, and occasionally pumas. Drive carefully at dawn and dusk when animals are most active. In Parque Nacional Los Cardones, stay on marked trails to protect both yourself and the fragile cactus ecosystem.
Mobile signal: There is little to no cellular coverage once you leave San Lorenzo. Download offline maps and inform someone of your plans before departing.
Practical Preparation
Documents: Your driver’s licence (international visitors will need an International Driving Permit alongside their home licence), passport, and vehicle rental paperwork. Keep digital backups stored separately.
Clothing: Layering is essential. The morning start in Salta may feel warm, but the Cuesta del Obispo winds are bitter, and the puna plateau can be cold even in summer. Bring a windproof jacket, sunglasses, and sun protection – the UV at altitude is intense.
In the car: Water (at least 2 litres per person), snacks, a fully charged power bank, a basic first-aid kit, and a torch. A blanket is not overkill – breakdowns in remote areas at night can be dangerous without one.
Local tip: Stop at the small roadside stalls between San Lorenzo and the Cuesta del Obispo – the locals sell delicious homemade empanadas and quicksilver fresh juices. It’s a perfect excuse to stretch your legs and refuel before the big climb.
Frequently Asked Questions
Is the route suitable for a day trip from Salta?
Yes, but it’s a long day. Driving non-stop takes 3.5 to 4.5 hours one way, so you’ll want at least 6 to 8 hours total at the destination to make it worthwhile. Many visitors choose to overnight in Cachi to explore the town properly and enjoy a relaxed evening.
Do I need a 4WD?
Not strictly. A standard sedan can manage the route in dry weather, but a 4WD provides better confidence on the rougher sections and more control in adverse conditions. If you’re visiting during the wet season or after recent rain, a 4WD is strongly recommended.
Are there any entrance fees?
Parque Nacional Los Cardones charges a small entrance fee (approximately 500 ARS per person as of 2024). Cachi itself has no entry fee. Prices can change, so it’s worth checking the park’s official website before visiting.
Can I drive this route solo?
Absolutely, but tell someone your plans and ensure your phone is fully charged before departure. The remoteness of the middle sections means you’ll want to be prepared for any eventuality. Joining a convoy with other vehicles is a sensible option if you’re uncertain about the roads.
What should I do if I feel unwell from the altitude?
Descend immediately to a lower elevation. Symptoms often improve within hours. If they persist or worsen, seek medical attention in the nearest town. Don’t push through it – the altitude affects everyone differently, and there’s no shame in turning back.
Where can I rent a car for this trip?
Rental desks are available in Salta’s city centre and at Martín Miguel de Güemes International Airport. Booking in advance is strongly advised, particularly during peak season, as vehicle availability can be limited. Compare rental options and book your vehicle to ensure you get the right car for mountain driving.
The Salta to Cachi route via the Cuesta del Obispo is the kind of drive that reminds you why road trips exist. It’s not the fastest route between two points – it’s about everything you discover when you’re not in a hurry. Take your time, breathe in the thin air at the top, and let the cacti of Los Cardones watch over your passage. Cachi will be waiting, whitewashed and unhurried, at the end of the road.
Last updated: May 2026