Salar De Uyuni

Salar de Uyuni: Bolivia’s Salt Flat

At 10,582 square kilometres and sitting at 3,656 metres above sea level, the Salar de Uyuni is the largest salt flat on earth. It was formed when prehistoric lakes dried out, leaving a crust of salt that averages 10 metres thick. The surface is flat to within one metre across the entire expanse, which is why satellite navigation systems use it to calibrate altimeters.

Dry Season vs Wet Season

This is the central question for planning a visit. The two seasons produce completely different landscapes.

From May through October (dry season), the salt is brilliant white and hard underfoot. The hexagonal salt crystal patterns are visible across the surface. The light at sunrise and sunset turns the flat orange and pink. You can drive out to Isla Incahuasi, a rocky outcrop in the middle of the flat covered in cacti up to 10 metres tall, and stand in a landscape that resembles nothing else on earth.

From December through March (wet season), a few centimetres of water floods the surface and creates the mirror effect that fills social media. The sky reflects perfectly in the thin water layer; the horizon disappears; objects on the flat appear to float above the clouds. The photographs require minimal manipulation to look surreal. The downside: the flat is slippery, some areas become impassable, and the 4WD tours are more constrained in where they can go.

April and November are transitional months and can go either way.

Getting There

Uyuni town is the base. It’s accessible by overnight bus from La Paz (around 10 hours), from Sucre (around 8 hours), or by small plane on Boliviana de Aviación from La Paz (about 1 hour). The buses are functional rather than comfortable at this price point; the flights save considerable time.

Most visitors book multi-day 4WD tours from Uyuni. Standard tours run 3 days and 2 nights, heading south from the salt flat through the Eduardo Avaroa Andean Fauna National Reserve to see the coloured lagoons (Laguna Colorada, Laguna Verde), the geysers at Sol de Mañana, and the hot springs at Termas de Polques. The cost runs around USD 100-180 per person depending on group size and agency quality. Check the vehicle before committing.

The Train Cemetery just outside Uyuni — a collection of rusting 19th century steam locomotives abandoned when the silver mining industry collapsed — is often a first stop on tours and takes about an hour to explore.

Logistics

Altitude is the main physical concern. Uyuni sits at 3,700 metres; the southern altiplano reaches 5,000 metres. Acclimatise in La Paz or Sucre before heading there. Symptoms of altitude sickness (headache, nausea, fatigue) are common in the first 24 hours.

The altiplano temperature swings are extreme: warm by day, well below freezing at night. Even in summer, nights at the remote refuges in the south require serious insulation. Bring more layers than you think you need.

Salt hotel accommodation on the flat itself is available; some lodges are constructed from salt blocks. The quality varies substantially and the better ones book up. For Uyuni town, several adequate hotels cluster around the central plaza in the USD 30-80/night range.