Pedernales Salt Flat and Turquoise Lagoon Tour: Guide, Routes and Prices

The 4x4 tour to Pedernales Salt Flat and Turquoise Lagoon departs from Copiapó or Diego de Almagro, climbing through the Andean precordillera to 3,370 m a.s.l. Covering 470 km round-trip via the historic mining town of Potrerillos and Cuesta Montandón (3,700 m a.s.l.), it includes a 45-minute flat hike across consolidated halite crusts to reach water holes and deep turquoise pools below Cerro Doña Inés.

The Largest Salt Flat in the Atacama Region: Access and Geography

Unlike the salt flats near San Pedro de Atacama, Pedernales Salt Flat sits in a closed endorheic basin of more than 300 square kilometers high in the Atacama Region, dominated by the volcanic cone of Cerro Doña Inés (5,075 m a.s.l.) on the northern horizon. Its geographical isolation kept it off conventional tourist circuits for decades, used almost exclusively by mining operations and geological prospecting.

The central highlight of the basin is its system of natural water holes (ojos de agua) and salt lagoons, crowned by the Turquoise Lagoon (Laguna Turquesa). High concentrations of sodium chloride, sulfates, and volcanic mineral sediments produce extreme water clarity and a vivid cyan hue that contrasts sharply against the white salt crusts.

The Route from Copiapó: Via Diego de Almagro, Potrerillos and Cuesta Montandón

Driving from Copiapó to Pedernales requires climbing over 3,300 meters of elevation from the valley floor to the Puna. On our guided departures, we divide the drive into four distinct operational sections:

 Copiapó (390 m)
   │
   ├─► Km 150: Diego de Almagro (780 m) [Last available fuel stop]
   │
   ├─► Km 195: Llanta & Ascent toward Potrerillos (2,850 m)
   │
   ├─► Km 215: Cuesta Montandón (3,700 m) [Highest altitude point on route]
   │
   └─► Km 235: Pedernales Salt Flat (3,370 m) ➔ Trailhead to Turquoise Lagoon

Section 1: Copiapó to Diego de Almagro (Routes 5 North and C-17)

We leave early in the morning via Route 5 North and turn onto Route C-17, running parallel to the historic northern railway line. This 150 km paved stretch is in good condition. Diego de Almagro is a mandatory logistics stop: we top off our fuel tanks and inspect tire pressures on spare wheels. Beyond this town, there are no fuel stations anywhere in the cordillera.

Section 2: Climb Through Llanta toward Potrerillos (2,850 m a.s.l.)

From Diego de Almagro, Route C-13 heads east past Llanta railway depot. The road gains gradient through precordilleran canyons toward the outskirts of Potrerillos. Built by the Andes Copper Mining Company in the early 20th century, Potrerillos operated as an American-style company town high in the desert. While the residential settlement was evacuated due to environmental regulations and only the Codelco smelter remains active, driving nearby offers a tangible look into Andean industrial history.

Section 3: Quebrada de Asientos and Cuesta Montandón (3,700 m a.s.l.)

After the turnoff to El Salvador, we join Route C-173 on packed dirt and gravel. The road winds steeply through Quebrada de Asientos and climbs Cuesta Montandón to reach 3,700 m a.s.l. This mountain pass is the highest point along the approach, where Puna winds blow constantly. We conduct pulse and pulse-oximetry checks here before descending into the salt flat basin.

Section 4: Descent to Pedernales Salt Flat Basin (3,370 m a.s.l.)

Past the pass, the track drops toward a wide white expanse ringed by volcanic cones. The final kilometers follow faint gravel tracks and salt dust to the western shore, where vehicles are parked on firm ground.

45-Minute Trekking to the Water Holes and Turquoise Lagoon

Reaching the water requires walking. The parking area sits on firm terrain at the outer rim of the basin where gravel and soil mix. From here, a flat 45-minute hike (approx. 2.5 km each way) leads out across the salt crust.

The terrain is completely flat, but walking at 3,370 m in dry desert air increases cardiovascular effort. Maintaining a steady, unhurried pace prevents early fatigue and altitude headaches for travelers who arrived recently from sea level.

As you advance toward the center of the basin, the ground shifts from dusty dirt to pure white polygonal halite plates. Abruptly, the crust opens into circular pools with sheer vertical edges: natural water holes. The most striking of these is the Turquoise Lagoon, whose mineral bed and transparent brine reflect the sky in an intense cyan blue.

Preservation Guidelines: Why You Must Not Break the Halite Crusts

Pedernales Salt Flat is delicate from both geological and ecological standpoints. The polygonal crusts underfoot are not solid bedrock: they are thin evaporitic salt sheets resting over liquid brine and saturated mud.

On our outings, we enforce strict field rules to protect the terrain and prevent injuries:

• Impact of Rigid Footwear: Heavy mountaineering boots with stiff soles break the sharp, fragile edges of halite crystals. We recommend flexible mid-cut hiking boots or approach shoes, stepping flat on your soles to distribute body weight without creating concentrated pressure points.
• Breakthrough and Sink Risk: Stepping onto thin or moist salt crusts can cause them to collapse underfoot. Sinking into brine or black mud damages footwear and exposes skin to concentrated, abrasive brine that stings open scratches severely.
• No Driving on Salt Crusts: Taking 4x4 vehicles onto the white surface off established tracks is strictly prohibited. Tire ruts on wet salt crusts remain visible for decades because annual rainfall in this region rarely exceeds 50 mm, meaning salt does not dissolve and recrystallize to heal vehicle tracks.
• Protecting the Aquatic Ecosystem: These water holes house extremophile microbial communities and microalgae that feed flocks of Andean flamingos (Phoenicoparrus andinus). Never rinse hands or feet wearing chemical sunscreen or insect repellent. Only certified mineral biodegradable sunscreens are acceptable.

Comparison: Full Day Trip vs. 2-Day Traverse with Laguna Verde

When planning from Copiapó, travelers face two main options: a full-day excursion returning to the city that evening, or an integrated two-day mountain traverse linking Pedernales with Maricunga Salt Flat and Laguna Verde.

For travelers with sufficient time, the two-day combined traverse is the preferred choice. It connects Pedernales with Maricunga Salt Flat via the interior mountain track of Vega San Andrés (Route C-601), joining Route CH-31. From there, the route continues to our Laguna Verde and hot springs tour at 4,340 m a.s.l., allowing you to soak in 40 °C thermal pools without driving 500 kilometers in a single day.

This integrated journey also serves as preparation for expeditions along the Ruta de los Seismiles or prior acclimatization before tackling the Ojos del Salado volcano ascent.

Logistics and Costs: Guided Tours vs. Autonomous 4x4 Rental

Deciding between a guided tour and an independent trip depends on your mountain driving experience and recovery gear:

Option A: Guided Tour from Copiapó or Diego de Almagro

• Reference Rates: Between CLP $80,000 and $120,000 per person on regular small-group departures (minimum 4 passengers), or CLP $280,000 to $380,000 for private excursions.
• Standard Inclusions: Transport in certified 4x4 vehicle, professional driver-guide certified in Wilderness First Responder (WFR), trail snacks and camp lunch, medical oxygen kit for altitude emergencies, and VHF/satellite communications.
• Key Advantage: Zero logistical stress regarding vehicle mechanics, fuel range, or navigating unmarked desert tracks. If you are looking for a natural hot springs experience at higher altitude, we also guide the Laguna Verde and hot springs tour from Copiapó along Route CH-31.

Option B: Self-Drive Expedition with Rental 4x4

If you have experience driving on rough mountain gravel and prefer an independent pace, you can arrange 4x4 truck rental in Copiapó. Our rental fleet includes mechanical low range (4L), reinforced All-Terrain tires, two mounted spares, a 12V air compressor, and recovery boards.

• 4x4 Rental Rate: $95,000 to $140,000 CLP per day (approx. USD 100 to 150).
• Fuel Consumption: Plan for 60 to 75 liters of diesel for the round-trip from Copiapó, accounting for increased consumption on steep climbs and thin air.
• Weather Check: Verify wind speeds before climbing; winds exceeding 60 km/h lift salt particles that can erode vehicle paint and lower wind chill drastically. Calculate wind conditions with our wind chill calculator.

Frequently Asked Questions about Pedernales Salt Flat and Turquoise Lagoon

Can you swim or float in Turquoise Lagoon at Pedernales Salt Flat?

Swimming is neither permitted nor recommended in Turquoise Lagoon. Unlike Baltinache or Cejar lagoons near San Pedro de Atacama, Pedernales lacks tourist infrastructure, wooden walkways, or freshwater showers to rinse off dense salt deposits. Entering the water also disrupts fragile aquatic mineral balances and damages benthic microbial mats.

Do I strictly need a 4x4 vehicle to get there?

Yes, a high-clearance 4x4 is essential. While the initial 150 km to Diego de Almagro is paved, Cuesta Montandón and Route C-173 feature severe washboard surfaces, sharp rocks, and pockets of loose volcanic sand where low-clearance passenger cars risk cracking oil pans or losing traction.

What is the altitude at the salt flat and how does altitude sickness affect visitors?

The salt flat surface lies at 3,370 m a.s.l., but reaching it involves crossing Cuesta Montandón at 3,700 m a.s.l. Ascending rapidly from Copiapó (390 m a.s.l.) within a few hours can cause mild headaches or breathlessness. Drinking water steadily, avoiding heavy meals the night before, and walking at an unhurried pace are essential preventive measures.

Where is the last fuel station along the route?

The final fuel station is located in Diego de Almagro. Beyond that point, throughout Potrerillos and Pedernales Salt Flat, there are no commercial fuel stations or mechanical repair shops. You must top off your fuel tank completely before climbing into the mountains.