Uyuni is not a destination you ease into. The town sits at 3,656 meters, the air is thin, the streets are dust, and the only reason travelers come is to leave again — into the Salar de Uyuni, a salt flat the size of Lebanon that takes three days to cross. This is one of South America's great wilderness trips, and it demands preparation. The payoff is a landscape that does not look like Earth.
The Salt Flat Itself
Salar de Uyuni covers 10,582 square kilometers. It formed when prehistoric Lake Minchin dried up 30,000 years ago, leaving a crust of salt up to 10 meters thick in places. The surface is not uniform. In the dry season — May through October — the salt crystallizes into hexagonal tiles that extend to every horizon. In the wet season, November through April, water floods the surface and creates the famous mirror effect. Travelers arrive expecting this reflection and often do not see it. Rain is unpredictable, and even in wet months the water can be too shallow or too patchy. Book the trip for the landscape, not the Instagram shot.
Most visitors cross the Salar on organized tours in Toyota Land Cruisers. Independent travel is possible but impractical — there are no roads, no fuel stations, and no rescue services once you leave the edge. The standard options are a one-day tour or a three-day tour. The one-day trip costs $20 to $60 and covers the Train Cemetery at the town's edge, the salt flat itself, Isla Incahuasi, and a sunset stop before returning to Uyuni. It is enough if you are only here for the photographs. The three-day tour costs $100 to $180 per person for a shared vehicle, or $300 to $500 for a private trip, and this is the real journey.
Day One: The Edge and the Interior
The three-day tour leaves Uyuni at 10:30 AM. The first stop is the Train Cemetery, three kilometers outside town, where rusted locomotives from the 1940s sit in the dust. It is free to enter. Then the road hits the salt flat at Colchani, a village where locals process salt and sell bags of it at stalls. There is a small salt museum here — a building made entirely of salt blocks. Entry is free, though donations are expected.
The vehicle drives onto the flat itself. The Salar has no visible landmarks, so drivers navigate by GPS and memory. After an hour you reach Isla Incahuasi, a hilly outcrop covered in giant cacti that grow one centimeter per year. Some are 9 meters tall and over 1,000 years old. The climb to the top takes 20 minutes and costs 30 Bolivianos, about $4.30. The view from the summit is flat white in every direction.
Lunch is served on the salt surface — usually quinoa soup, llama steak or chicken, rice, and vegetables prepared by the driver. Tour companies include all meals on days one and two, plus breakfast and a late lunch on day three. You need to buy your own water. Bring at least three liters per day. The altitude, sun, and dry air dehydrate you faster than you notice.
The first night is spent in a basic hostel at the salt flat's edge or in one of the salt hotels. These buildings are constructed from salt blocks, with salt floors and salt furniture. They are an experience, not a luxury. Electricity is limited, hot water is rare, and the temperature drops below freezing after dark. Sleeping bags are provided, but bring thermal layers.
Day Two: The Altiplano
Day two leaves the salt flat and enters the high desert. The altitude climbs above 4,500 meters and peaks near 5,000 meters at the Sol de Mañana geysers. The air is thin enough that walking 50 meters feels like running. If you have not acclimatized in La Paz or Potosi for at least two days before arriving, altitude sickness is likely. The symptoms are headache, nausea, and shortness of breath. Guides carry oxygen tanks but use them only in emergencies. Bring soroche pills — available at any pharmacy in La Paz for about $3 — and start taking them 24 hours before the tour.
The morning stops include the Ojos de Salar, small bubbling holes where underground water breaks through the salt crust, and the Chiguana salt flat, smaller and less visited than Uyuni. Then the terrain shifts to volcanic rock and sand. The Sol de Mañana geysers sit at 4,900 meters and spew sulfur steam from mud pools that boil at the surface. You can walk among them, but the ground is unstable and the steam burns. Stay on the paths your driver indicates.
Lunch is at Termas de Polque, natural hot springs where you can soak in 30-degree water while the outside temperature is near freezing. Entry is included in most tours. Afterward the route passes Laguna Colorada, a shallow lake colored red by algae and mineral sediment. This is the primary feeding ground for the James's flamingo, and flocks of several hundred work the shallows. The lake is inside Eduardo Avaroa Andean Fauna National Reserve. The entry fee is 150 Bolivianos, about $21.50, payable in cash only. There is no ATM for 200 kilometers.
The second night's accommodation is the most basic. Dormitory rooms with stone beds, shared bathrooms, no showers, and no guaranteed toilet paper. The sleeping bags provided are necessary — night temperatures at this altitude drop to -15 degrees Celsius. Some higher-end tours use lodges with private rooms and slightly better heating. If you book with Red Planet Expeditions, Andes Salt Expeditions, or Quechua Connection, read recent reviews specifically about vehicle condition and driver experience. Mechanical failure at 5,000 meters is not a minor inconvenience.
Day Three: Lagoons and the Exit
Day three covers the Dali Desert, named for the rock formations that look like something from a surrealist painting, and Laguna Verde, a green lake at the foot of Licancabur Volcano. The color comes from arsenic and copper minerals suspended in the water. It is toxic — do not swim.
The standard tour ends back in Uyuni at roughly 6:00 PM on the third day. Some operators offer a drop-off in San Pedro de Atacama, Chile, for an additional $30 to $50. This saves backtracking but requires you to carry your full luggage on the tour, which means less space in an already cramped 4x4. Most travelers leave their main bags at their La Paz hostel and travel to Uyuni with a small pack.
Getting to Uyuni
The overnight bus from La Paz is the standard route. Todo Turismo runs the most reliable service, departing at 9:00 PM and arriving at 6:30 AM. A seat with 160-degree recline costs 140 Bolivianos, about $20. Cisne and other operators offer basic seats for 70 Bolivianos, about $10, but the nine-hour ride at altitude is uncomfortable enough that the extra money for a better seat is worth it. Buy tickets at least 24 hours ahead in peak season — June through August. The bus terminal in Uyuni is on the main street, Avenida Ferroviaria, and most tour offices are within two blocks.
Uyuni also has an airport with flights from La Paz on Boliviana de Aviación, but schedules are irregular and prices are high — often $150 one-way for a 45-minute flight. The airport departure tax is 15 Bolivianos, about $2.20, in cash only.
The train runs once per week from Uyuni to Oruro and Villazon. It is slow and unpredictable, but some travelers prefer it to the bus for safety — night buses on this route have reports of theft from overhead luggage compartments. Keep valuables on your person.
Practical Costs
- Three-day shared tour: $100–$180
- Three-day private tour: $300–$500
- One-day tour: $20–$60
- Sunrise tour (3:30 AM pickup): $25
- Starlight tour (11:00 PM pickup): $25
- Eduardo Avaroa Reserve fee: 150 BOB ($21.50)
- Isla Incahuasi fee: 30 BOB ($4.30)
- Guide tip: $3–$4 per day
- Bus La Paz–Uyuni: 70–140 BOB ($10–$20)
- Hostel in Uyuni: $10–$25 per night
- Salt hotel (Palacio de Sal): $200+ per night
What to Bring
Layers are essential. Daytime temperatures on the salt flat can reach 20 degrees Celsius with intense UV — the reflection doubles your exposure. Nighttime temperatures drop to -15 degrees. Bring a down jacket, thermal base layers, a wool hat, gloves, and a buff or scarf. Sunglasses are mandatory — the white surface causes snow blindness without them. Sunscreen should be SPF 50+. A headlamp is necessary for hostel bathrooms and the starlight tour. Waterproof boots or wellies are provided by most operators for the wet season, but bring your own if your feet are larger than European size 44.
Bring cash in Bolivianos. There are no ATMs on the route, and most shops in Uyuni do not accept cards. Carry at least 400 Bolivianos beyond your tour cost for water, snacks, bathroom fees (5 BOB per use), and emergencies.
What to Skip
The sunset-and-starlight combined tour sounds romantic but is exhausting. You return at 10:00 PM and are picked up again at 3:30 AM for the sunrise tour. Sleep matters more at altitude. Book them on separate nights, or skip the sunset tour entirely — the sunrise on the salt flat is the better spectacle, and the stars at 3,700 meters with no light pollution are genuinely spectacular.
Do not expect the mirror effect. If it happens, it happens. The dry season offers more reliable conditions, clearer skies, and the iconic hexagonal salt patterns. The wet season offers a chance at reflections and the risk of rain, mud, and road closures.
Uyuni town itself has little to offer beyond pizza restaurants, basic hostels, and tour agencies. Most travelers arrive on the morning bus and leave on a tour the same day. One night in town before the tour is enough to recover from the bus and sort logistics.
The Salar de Uyuni is not a comfortable trip. It is cold, high, basic, and unpredictable. But the scale of the place is real — 10,000 square kilometers of salt, silence, and nothing else. That is the point.
By Marcus Chen
Adventure travel specialist and certified wilderness guide. Marcus has led expeditions across six continents, from Patagonian ice fields to the Himalayas. Former National Geographic Young Explorer with a background in environmental science. Always chasing the next summit.