The Lagunas Bravas 4x4 Traverse is one of the most remote high-mountain circuits in northern Chile, covering about 600 kilometers round trip from Copiapó through volcanic gorges and salt flats above 4,200 meters. The route crosses the Río Juncalito Canyon, the thermal deposits of Azufrera Los Cuyanos, the Salar de Piedra Parada and pristine lake basins such as Laguna del Jilguero, Laguna del Bayo and the Lagunas Bravas complex. It takes three days of self-sufficient expedition, vehicles with a low-range transfer case and thermal camping gear to handle nights as cold as -18 °C.
Geographic note (BLUF): in search engines this circuit is often confused with the Laguna Brava Provincial Reserve in La Rioja (Argentina). They are two completely different destinations. The Argentine Laguna Brava has road access on Route 76 from Vinchina and cylindrical 19th-century stone huts. The Lagunas Bravas (Atacama, Chile) are an isolated lake complex at the foot of Cerro Sierra Nevada (6,127 m), with no paved roads, no huts and no commercial checkpoints.
At Vulcano Expediciones we operate in this stretch of the cordillera, organizing the Lagunas Bravas tour from Copiapó both as a guided 4x4 traverse and as logistical support for mountaineers. Completing this 3-day Lagunas Bravas circuit through the Lagunas Bravas in Atacama basins and the gorge of Juncalito Canyon in Atacama demands meticulous preparation. Below we detail the route plan, the mechanical requirements of the vehicle and the self-sufficient camping guidelines we apply on our trips.
Traverse Technical Sheet
| Parameter | Field-verified value | Operational detail |
|---|---|---|
| Total distance | 580 to 640 km (round trip) | Departure and return in the city of Copiapó |
| Suggested duration | 3 days / 2 nights | Pace for acclimatization and mechanical safety |
| Maximum altitude by vehicle | 4,450 m | Passes between volcanic basins |
| Camp altitude | 4,200 to 4,310 m | Piedra Parada and the western shore of Lagunas Bravas |
| Drivetrain | 4WD with low range (4L) mandatory | Stretches of loose sand, stony riverbed and scree climbs |
| Recommended tires | All-Terrain 10-ply (Load Range E) | Two spares, mounted and checked on the rim |
| Fuel range | At least 700 km equivalent | Full tank in Copiapó plus 60 to 80 liters in jerrycans |
| Drinking water reserve | 5 to 6 liters per person per day | Springs in the area contain salts and heavy metals |
| Typical temperatures | 18 °C day / -10 °C to -18 °C night | Katabatic winds over 60 km/h in the late afternoon |
| Phone coverage | None along the entire cordillera route | inReach, Starlink Mini or satellite phone required |
Differences: Lagunas Bravas in Atacama vs. Laguna Brava in La Rioja
The confusion between the two place names online leads many drivers to plan their trip with wrong data on services or travel times. This table summarizes the key differences between the two Andean sites:
| Feature | Lagunas Bravas (Atacama, Chile) | Laguna Brava (La Rioja, Argentina) |
|---|---|---|
| Political location | Atacama Region, Copiapó province | La Rioja province, Vinchina department |
| Urban starting point | Copiapó (280 km by gravel and track) | Vinchina or Jagüé (140 km by pavement/gravel) |
| Main road | Route CH-31 and mining detours/4x4 tracks | National Route 76 toward Paso Pircas Negras |
| Road type | Heavy gravel, washboard and unmarked sandy track | Almost continuous pavement to the lake |
| Infrastructure and huts | None; self-sufficient camping required | Historic stone huts ordered built by Sarmiento |
| Nearest guardian peak | Cerro Sierra Nevada de Lagunas Bravas (6,127 m) | Volcán Veladero (6,436 m) and Monte Pissis (6,795 m) |
| Institutional presence | Carabineros in Maricunga (90 km away) | Provincial ranger post in Jagüé and El Peñón |
| Navigation difficulty | Very high (requires precise waypoints and a mountain GPS) | Low to moderate on a marked corridor |
If your goal is the Chilean basin, you must leave Copiapó fully prepared for a remote expedition. If you are looking for information on the neighboring cordillera, you can read our guide to the Seismiles Route in Argentina.
The Circuit Step by Step: Landmarks and Terrain Geography
The route combines the climb up the Quebrada de Paipote with the entry onto the great Puna de Atacama plateau. From 3,700 meters upward the landscape changes drastically, dominated by endorheic salt flats and Miocene volcanic cones.
Copiapó (800m)
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├─► Km 155: Salar de Maricunga & Laguna Santa Rosa (3,760m)
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├─► Km 190: Turnoff to the north / Quebrada de Juncalito
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├─► Km 220: Río Juncalito Canyon (3,900m) [Basalt walls and fords]
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├─► Km 250: Azufrera Los Cuyanos & Salar de Piedra Parada (4,150m) [Camp 1]
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├─► Km 285: Laguna del Jilguero and Laguna del Bayo (4,230m)
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└─► Km 310: Lagunas Bravas complex (4,280m) [Sierra Nevada Base Camp 6,127m]
1. Río Juncalito Canyon
After leaving Route CH-31 heading north, the track winds into the Río Juncalito Canyon. The river runs hemmed in between vertical cliffs of volcanic rock and ignimbrites in ochre and violet tones.
In this stretch driving means fording streams with soft gravel banks and dodging rockfall blocks. In the early morning hours the water's edge is frozen. In this same drainage corridor the Frozen Waterfall of the Río Juncalito forms in winter, a vertical wall of ice 7 meters high at 3,900 m. On the summer traverse to Lagunas Bravas, it pays to drive slowly in intermediate gears in high-range 4x4 (4H) so that thrown rocks do not hit the brake lines or the oil pan.
2. Azufrera Los Cuyanos Volcano
Leaving the canyon toward elevations above 4,000 meters, the landscape opens onto the hydrothermal complex of Azufrera Los Cuyanos Volcano. The hillsides show deposits of native sulfur in intense yellow, interspersed with reddish veins of iron oxides and white sulfates.
The track crosses scree of fine material where the wind carries ash and volcanic dust. Here visibility can drop suddenly if the wind exceeds 50 km/h, which is common between 14:00 and 18:00.
3. Salar de Piedra Parada
The Salar de Piedra Parada is a salt basin perched at 4,150 meters. It is named for the gigantic dacite monoliths that rise alone from the flat surface, carved by thousands of years of wind abrasion.
This is one of the best spots for the first camp. The cliffs and larger rocks give natural shelter from the southwest winds. The ground is firm, but you need to secure the tent guylines with heavy stones, since conventional stakes do not hold in the sandy substrate.
4. Laguna del Jilguero and Laguna del Bayo
Moving toward the heart of the circuit you pass two shallow high-Andean lakes: Laguna del Jilguero and Laguna del Bayo. Both hold extremely saline water where Andean and James's flamingo colonies live during the summer season.
Along the margins of these lakes the ground is deceptive: the surface salt crusts hide water-saturated mud with the consistency of quicksand. Never bring the trucks within 100 meters of the water's edge. Keep the tracks on the upper terraces of firm gravel at all times.
5. Lagunas Bravas Complex
The vehicle section of the circuit ends at the Lagunas Bravas, at 4,280 meters. It is a string of lake basins fed by underground meltwater, whose colors shift between emerald green and deep turquoise depending on the angle of the sunlight and the wind.
To the east and north the wall of the volcanic massif looms, with Cerro Sierra Nevada de Lagunas Bravas dominating the horizon. The solitude here is absolute: on our traverses we rarely meet anyone in entire days of navigation.
High-Altitude Camp Logistics: 3 Days and 2 Nights
Operating above 4,200 meters without outside support demands camp discipline. The combination of hypoxia, sub-zero cold and dry air wears the body down much faster than at mid elevations.
Choosing a Site and Pitching Tents
The Andean thermal wind picks up around mid-afternoon. Always look for a small gully or the eastern face of a rocky hillock to protect the camp.
- 4-season tents: use only geodesic models with duralumin poles at least 9 mm in diameter. Beach tents or 3-season tents collapse under sustained gusts of 70 km/h.
- Rock anchors: forget lightweight aluminum stakes. Rest rocks of 8 to 15 kilos on the perimeter straps and the main guylines of the tent. Put protective cloth or old gloves between the cord and the rock so the cords do not get cut by rubbing.
- Vehicle position: park the trucks at a 45-degree angle to the prevailing wind to create a physical barrier for the kitchen and resting area.
Sleep System and Thermal Insulation
At night the thermometer usually drops to -12 °C in January and can read -20 °C late in the season (April and May).
- Sleeping bag: it needs a certified comfort rating (EN 13537 or ISO 23537) of at least -15 °C to -20 °C, preferably filled with 800+ fill-power goose down with a windproof outer fabric.
- Ground insulation: frozen ground draws body heat faster than the surrounding air. The most effective combination is a closed-cell foam pad on the ground and, on top of it, an inflatable pad with an R-value above 4.5.
Water, Cooking and Food
There is no drinking water available at Lagunas Bravas. Surface springs carry dissolved boron, arsenic and sulfates that no portable field filter can fully remove.
- Water calculation: carry 5 to 6 liters of clean water per person for each day from Copiapó. For 3 days of traverse in a vehicle with 3 occupants, the minimum load should be around 50 liters of water in clean food-grade jugs.
- Liquid-fuel stoves: gas stoves with butane cartridges lose pressure and stop vaporizing when the temperature drops below 0 °C. Use multi-fuel white gas stoves (mountain gasoline) or, if you use gas, choose blends with 70% or more propane and put the cartridge inside your sleeping bag the night before using it.
If you need specific technical equipment for this trip, check the options in our article on mountain gear and 4x4 truck rental in Copiapó.
Mechanical Preparation and 4x4 Driving on the Puna
At 4,300 meters atmospheric pressure drops by around 40%. Naturally aspirated engines lose power noticeably, and turbodiesels see higher exhaust gas temperatures when asked for torque on long climbs.
Pressure on volcanic sand (Salar and dunes) ──► 18 to 20 PSI (Larger contact patch)
Pressure on sharp gravel (Juncalito Canyon) ──► 28 to 32 PSI (Protects sidewalls from rocks)
1. Essential Vehicle Requirements
- Low-range transfer case (4L): an electronic AWD system is not enough. On the stony climbs and dune crossings around Piedra Parada, a low gear lets you move at 10 km/h while keeping the engine in its optimal torque curve without overheating the clutch or the transmission.
- 10-ply tires (Load Range E): the dacite and basalt rocks of the area have edges as sharp as knife blades. Standard passenger tires suffer irreparable sidewall cuts.
- Two spare wheels: both spares must be the same size and inflated before leaving Copiapó. Splitting a wheel in Juncalito Canyon leaves the vehicle with no margin for error for the remaining 300 kilometers.
2. Fuel Range
The average consumption of a loaded 4x4 truck on the Puna rises 40% to 50% compared with highway consumption:
- A 2.8 or 3.0 liter engine delivers between 5 and 6.5 kilometers per liter on loose gravel with low range engaged.
- To cover the 600 kilometers of the expedition with a reserve margin for getting lost or forced detours, you need a usable capacity of at least 120 to 140 liters of fuel.
- Fill the tank at the last service station in Copiapó and carry 3 to 4 metal jerrycans or approved polyethylene 20-liter jerrycans firmly secured in the pick-up bed.
For details on pressures, tools and recovery, see our guide to 4x4 logistics and huts on the Seismiles Route.
Summit Connection: Cerro Sierra Nevada (6,127 m)
The Lagunas Bravas basin is not just a scenic objective: it is the natural base camp for one of the most isolated and least climbed mountains in the entire Andes range: Cerro Sierra Nevada de Lagunas Bravas.
At 6,127 meters, this border volcanic massif demands a meticulous technical approach. While neighboring 6,000 m peaks such as Volcán Ojos del Salado or Nevado San Francisco have huts or vehicle roads nearby, on Sierra Nevada there is no track at all beyond the lagoons.
The climb involves setting up advanced camps on steep volcanic scree and crossing hard snow slopes and penitentes, with night temperatures falling to -25 °C at the high camp. For this reason, driving the 3-day circuit beforehand is the best active acclimatization for those planning to climb its summits.
Cerro Sierra Nevada (6,127 m)Expedition to the Most Remote Summit of Lagunas Bravas
10-day high-mountain climb combining a 4x4 approach through Juncalito with high-altitude camps on the Chile-Argentina border.
If you want to place this massif and the surrounding peaks of the Atacama Region on a map, you can use our Interactive Map of the Seismiles.
Frequently Asked Questions About the Lagunas Bravas Traverse
Can the Lagunas Bravas circuit be done in an SUV or a vehicle without low range?
No. The volcanic sand stretches at the Salar de Piedra Parada and the rock steps of Juncalito Canyon require a low-range transfer case (4L) and ground clearance above 22 cm. An urban SUV overheats its transmission on the scree and runs a real risk of breaking the oil pan or ripping tires on the basalt rocks.
What is the best time of year for the traverse?
The optimal window runs from November to April. During these months daytime temperatures are more bearable and the gorges stay free of accumulated snow. Between June and September the altiplano winter freezes the Juncalito fords solid and winds can exceed 100 km/h with whiteout storms.
Do I need to arrange permits to enter the area?
Driving through does not require a specific park permit, since the area lies outside Nevado Tres Cruces National Park. However, for safety it is mandatory to report your route to Carabineros at the Maricunga post and, if you plan to climb the Sierra Nevada summit, because it lies in a border zone, to obtain the corresponding DIFROL authorization.
Where is the last point to get fuel and water?
The city of Copiapó is the last place with service stations, supermarkets and running drinking water. Once past the Paipote checkpoint there are no stores, mechanics or fuel pumps along the whole cordillera route.
