Salar de Uyuni is the largest salt flat in the world and one of the most amazing natural attractions of Bolivia. Whether you're walking on the seemingly endless white, desolate surface of the dry flats, or admiring the simply perfect reflection of the clouds and blue sky above when there's water — all travellers agree the Salar de Uyuni offers an out-of-this-world experience.
The flats cover an area of over 10,000 km² and to see the best parts, you'll need to cover quite some ground. While it's possible to explore this unique piece of land on your own, most visitors opt for organized tours along some of the best sights.
The Salar is part of the Bolivian Altiplano, and its history began when that high plateau emerged as a result of uplift of the Andes. About 30,000 to 42,000 years ago, the area that is now the Salar de Uyuni was a huge, deep lake known as Lake Minchin. As Lake Michin dried up, it left smaller lakes behind, which in turn dried up until two current-day lakes and two salt deserts remained, of which the Salar the Uyuni is the largest one. One of those two lakes, called Poopó, still has a major impact on Salar de Uyuni. As Titicaca, another large current-day lake of the Altiplano, overflows during wet season, it fills up lake Poopó. As Poopó overflows in turn, it floods the salt flats, creating the stunning landscapes of winter, when a thin layer of water creates magical reflections of the sky and anything or anyone on the flats.
The area is the biggest lithium reserve of earth, containing some 70% of world's lithium in form of salt. Yearly, around 25,000 tonnes of salt are mined here, out of estimated 10 billion tonnes.
Thanks to the sedimented salt, the area is perfectly flat and is often used for various technical purposes (testing of vehicles and the like).
In the middle is Isla del Pescado, a volcanic rock. It provides great views and is a natural reservation.
There isn't much flora, mostly just grass and bush. The Isla del Pescado is covered by an ancient cacti forest, cacti like Echinopsis atacamensis pasacana and Echinopsis tarijensis, which grew up to 12 meters high. The cacti grow at pace of 1 cm per year, hence their age is up to 1000 years.
In November, three types of flamingoes flock here. 80 other bird species are present, and few other small animals.
Very little rain happens in the area, but yearly flooding occurs, mostly in January. At that time the whole area changes to a world's highest altitude mirror. After the water evaporates, bee-hive-like polygons cover the area.
Temperature peaks at 21°C in November-January, and 13° in June. Nights are cold all through the year, -9 to 5°C. Rainfall outside January is almost non-existent.
Dress in layers. Parts of the Salar are very windy, and temperature drops at sunset. Also, make sure to bring sunscreen and lip balm, as the sun is very bright due to the high altitude, and sunlight can reflect off of the salt. A hat is a good idea too, but make sure it doesn't blow away!
Most organized tours start in Uyuni, usually Uyuni Plaza Arce 📍. For independent travellers on a budget it's possible to hop on a local bus from Uyuni to Colchani, which crosses the salt flats, and ask the driver to let you out where you want to be. This way, you're free to walk around and explore the area on your own but you should count on a hike of at least two hours to any salt hotel. A local bus should cost Bs10, and you can catch a bus in the street where most the bus companies have their offices, around the corner of Cabrera St. and Arce Av. La Paz’s Terminal de buses.
Single-day and multi-day tours are available. Multi-day tours allow you to see more, including nearby desert areas beyond the salt flat, but they also bring a greater risk of altitude sickness as they go to significantly higher altitudes.
Alternatively, you can start your trip from Tupiza 📍. Tour prices are more or less the same as in Uyuni, but tours starting from here often include more lakes and interesting rock formations. Because this option is less popular, you probably won't encounter as many other tourists on your tour. The end point is Uyuni, although there are options for transportation to Chile.
San Pedro de Atacama 📍 (Chile) provides virtually identical tours to those from Uyuni, only reversed, and about 50% more expensive.
No fees or permits are required to enter the salt flats itself, but the vast majority of visitors come on an organized tour.
As of 2018, expect to pay somewhere around Bs. 200 per person for a one-day tour (including lunch) and at least Bs. 600 for a 3 day tour (including lodging, meals, water and toilet paper), plus Bs. 50 if you want onward transport to San Pedro de Atacama. Many 3-4 day tours get sold for Bs. 800-850, but they are essentially all the same and if you are good at bargaining, aim for the Bs. 600 mark. For the several day tours, you might require an additional Bs. 200 for national park entrance (Laguna Colorado), rest-rooms, thermal pools, etc., but this is paid directly on-sight, and not to the agency nor the driver. Do not fall for the double room extra pricing of US$100 or so—this is way overpriced and sometimes you even get a double room anyhow for the first night.
Tours are cheaper for larger groups, so if you're by yourself or with just one friend, try to meet other people and form a group of four to six for a better per-person rate. However, this shouldn't really be off your concern, because often tourists are shuffled around to fill the cars. It seems actually to be more a way of tricking people into believing they have to pay more. Do not fall for this scam, just head to the next tour agency.
Simple sunrise/sunset tours for photography go for Bs. 130, for a fully loaded van.
Standardized car-tours are the most common way of visiting the salt flat. Because of the sheer area size and hostility of the environment, moving by feet or even bicycle is not easy.
The salt flat is very difficult to navigate if you don't know what you're doing. Tour guides are familiar with the landmarks and mountains in the distance and use them extensively when driving around the salar. Trying to navigate it on your own is not recommended.
Your big shopping opportunity is at Colchani, which has lots of stands selling clothes, food, and all kinds of trinkets and souvenirs. Beyond that, you can find souvenirs in the town of Uyuni.
Tours should provide meals, and vegetarian options are possible. You may end up eating a meal at a salt hotel, even if you don't sleep there. Isla Incahuasi also has a restaurant.
The tours sometimes bring not enough water supply. Get informed, you may need to take 2 liters or more per day.
If you take a multi-day tour, the tour will organize lodging for you.
For lodging before and after your trip to the Salar, look for a place in Uyuni or Tupiza.
Related: Potosí (department)
Primary administrative division