Salar de Uyuni: getting there, tours and the two seasons

Entry into Bolivia follows the same rules as this site's La Paz guide: check your visa group, carry a passport valid for six months, and keep your entry record safe. Uyuni adds no border of its own, unless your tour ends across the Chilean border, an option some three-day tours offer as a transfer to San Pedro de Atacama. If you take it, Chile's entry rules apply at that crossing, so check them before you book, and make sure your Bolivian exit is recorded as you leave.

Inside Bolivia, the items to confirm are commercial rather than governmental, and they belong in writing from your operator: what the price includes, which protected-area and island fees are extra, where you sleep each night, and what happens if weather closes part of the route. Protected-area fees on the longer circuit are set by the administering authorities and change over time, so a total quoted without them is not the total.

The fast option is to fly. Boliviana de Aviación (BoA) flies from El Alto airport in La Paz to Uyuni, a direct flight of about an hour. Frequencies are limited and schedules change, so check BoA for your dates, and remember the trip starts at one of the highest airports in the world: apply the altitude advice in the La Paz guide from the first day, not after it.

The standard option is the overnight bus. Tourist buses, Todo Turismo among them, leave La Paz in the evening and reach Uyuni early the next morning after roughly ten hours on the road, timed so travellers can join a tour the same morning. Seats recline for sleeping; carry your warm layer and medication in the cabin, because the luggage hold is not accessible en route and the altiplano night is cold.

Either way, Uyuni town is the hub: tours leave from the offices around the station area in the morning, and most travellers either tour on arrival day or sleep one night in town and tour the next. If your bus or flight is delayed, a same-day tour start is the first thing at risk, which argues for the night in town when the schedule allows.

The one-day tour covers the core of the flat itself: the train cemetery outside town, the salt-processing village of Colchani, the salt museum and hotel built of salt blocks, the open crust where the perspective photographs are taken, Incahuasi Island with its giant cacti, and sunset over the salt before the drive back to Uyuni. It is a long day in the vehicle with short stops, and it returns to the same bed in town.

The three-day tour adds the country beyond the flat: the Siloli desert, the lagoons of the Eduardo Avaroa reserve with their flamingos, geysers and a hot spring, and nights in small lodges, some built partly of salt. It ends back in Uyuni or, by arrangement, at the Chilean border for San Pedro de Atacama. The driving is longer, the lodging simpler, and parts of the circuit climb higher than the salt flat itself.

Choose by what you came for. The mirror photographs and the island fit inside one day in the wet months; the lagoons, the desert and the flamingos need the three days. Ask any operator for the itinerary in writing, including lodging, meals, fees and the vehicle's passenger count, before you compare prices: two tours at the same price are rarely the same tour.

In the rainy months, roughly December to April, rain leaves a shallow sheet of water on the crust and the flat becomes a mirror that reflects the sky. It is the famous view, and it comes with trade-offs: parts of the flat can be too flooded to cross, Incahuasi Island may be unreachable, and itineraries change with the water. Tours still run, but the route belongs to the driver on the day.

In the dry months, roughly May to November, the crust is firm and patterned with salt polygons, vehicles can cross freely, and the island is a standard stop. The sky is usually clearer and the nights colder. Neither season is the wrong one; they are two different places sharing one name. Pick the mirror if reflections are the point of your trip, and the dry months if the full circuit matters more.

Most visitors sleep in Uyuni town, a small grid of streets with hotels and hostels in every range a town of its size can offer, the tour offices, and the bus and airport arrivals. It is a practical base rather than a destination, and one night before the tour is the pattern that protects the itinerary.

A smaller number of hotels built from salt blocks stand at the edge of the flat near Colchani. They trade the town's restaurants and tour offices for distance: confirm how you reach your tour start, and the airport or bus, from there. On three-day tours the lodging is chosen by the operator as part of the circuit, so the questions to ask are about heating, hot water and electricity rather than location.

Pack for sun and cold at the same time. The altitude makes ultraviolet strong even on a cold day, so sunglasses, sunscreen and a hat are equipment, not accessories. Layers and a windproof shell handle the swing from a warm vehicle to a freezing viewpoint; nights in the dry winter can fall well below freezing. Carry water, small cash for toilets and fees where cards are not taken, and a power bank, because camera batteries fade fast in the cold and the best light comes at the day's cold ends.

If you sleep with a CPAP, plan the power before you book. Uyuni town hotels are on the grid; the lodges on the three-day circuit are simpler, and electricity may run for limited hours. Tell the operator you need overnight power and confirm the answer in writing, carry battery capacity for the circuit nights, and read this site's guide to flying with a CPAP and its batteries before you travel. The CDC notes that the effects of altitude are greatest during sleep, which is a reason to discuss sleeping at 3,656 metres with your clinician, and to keep the first night in town easy.

On the flat, stay with your group and follow your driver's line: the crust is a working salt landscape, vehicles follow established tracks, and a white horizon with no landmarks is a genuinely easy place to get lost. Ask before photographing the salt workers at Colchani, and buy the small salt crafts where they are made if you want a souvenir.

Spanish covers Uyuni town and the tours; the pocket phrases below include the questions travellers ask most. Tips for drivers and guides are customary on multi-day tours; ask your operator what is normal for their crews rather than guessing.

The risks at Uyuni are environmental: altitude, sun, cold and distance. Medical care in Uyuni town is basic, and the three-day circuit travels far from it, so travel insurance that covers high-altitude activity and evacuation is a sensible condition of going, and any condition affected by altitude, or by sleeping with a machine, belongs in a conversation with your clinician before the trip.

On the road, use the established operators, keep valuables in your daypack rather than the hold on overnight buses, and tell someone outside the tour your itinerary and return date, because mobile coverage on the flat and in the reserve is patchy at best.