What to Pack for the Uyuni Salt Flats

What the Climate Data Actually Shows

The figures below come from the Open-Meteo ERA5 archive for Uyuni town, averaged over 2016 to 2025. They are measured values, not guidebook guesses. The average night low stays above freezing only from October through April. From May to September it sits below zero, bottoming out near -4°C in June. On the 3-day southwest route the second night is spent beside Laguna Colorada at 4,278 m, inside a reserve that spans 4,200 m to 5,400 m, so the nights there are colder still. Pack as if every evening will be a winter evening.

The wet season runs from December to March. January averages 95.8 mm of rain over about 15 rainy days, and February 85.0 mm over about 15 days. That means a rain shell and shoes you do not mind soaking, because the mirror effect that draws visitors in these months comes from standing water on the salt.

The Layering System That Works

Four layers cover the whole range. A base layer for the morning departure, when jeeps leave Uyuni around 10am with the air still cold. A fleece or light mid layer for the day. A windproof outer shell, because the salar is a flat white plain 126 km long and 84 km wide with nothing to break the wind. And a warm insulated jacket for the evening stops and, on multi-day routes, the refuge nights.

Add a warm hat and gloves year-round. On the sunset and stargazing tours the operators say it plainly: the listing for the sunset and stargazing tour tells passengers to bring warm layers, gloves and a hat because nights on the salt flat get cold. Stargazing means standing still in the dark at 3,663 m, which is far colder than walking around at midday. Thermal leggings are worth the space in a daypack from May to September, when the low averages below -1°C even in September.

Footwear for Salt, Water and Volcanic Ground

In the dry season, from April to November, comfortable closed walking shoes are enough. The salt crust averages 8 meters thick and is hard underfoot, though salt crystals are abrasive, so shoes you care about will suffer. In the wet season you need waterproof footwear with grip, because the mirror effect forms where 2-20 cm of water stands on the salt, and one field visit measured the layer at 1.8 cm. Some tours supply rubber boots themselves: the sunset and stargazing tour includes waterproof wellies in the price, and the sunset mirror effect day tour supplies rain boots for walking in the water, so check before you buy your own. The On Experiences 3-day route lists rubber boots as not included.

On the 3-day routes you also walk on volcanic ground. The Sol de Mañana geyser field sits at about 4,900 m and the trail loop on Isla Incahuasi takes 30 to 45 minutes on a rocky path with a 15 to 20 minute climb, so a shoe with a firm, gripping sole beats a thin sneaker there.

Sunglasses Are Not Optional

Most listings that print a packing list name sunglasses. One day-tour listing puts them next to trekking shoes, sunscreen and a passport, and the 1-day sunset and 3-day San Pedro listings both name them too. The reason is the surface itself: the salar covers 10,582 km² of white salt with an elevation that varies by less than one meter across the whole area, so there is no shade and no escape from reflected light.

In the wet season a thin sheet of water turns the flat into a mirror about 129 km across, reflecting the sky as well as the sun. Bring sunglasses with full UV blocking, not fashion lenses, and consider a strap so you can take them off during the perspective photos without losing them.

Sunscreen and a Hat

The salar sits at about 3,663 m, and the highest stops on the southwest route reach about 4,900 m at the geysers, inside a reserve that climbs to 5,400 m. Apply a high-factor sunscreen before the morning departure and reapply at midday. A wide-brimmed hat or a cap with a neck flap covers the hours at the photo stops.

Lip balm with sun protection matters too, because lips burn fast in dry, thin air. A small moisturizer helps on a 3-day route, where you spend 2 nights in dry high-desert air.

Which Tours Include a Sleeping Bag

The answer varies by operator, and it is the kind of detail that changes what you pack. The 3-day salt flat and colored lagoons tour lists the sleeping bag rental as excluded from its $290 price, which means you either rent one on arrival or bring a liner and sleep in your clothes. The 3-day tour ending in San Pedro de Atacama includes a sleeping bag from May to September for the cold winter nights, so in the warmer months you would need to arrange one. The Tours Transandino 3-day route also excludes the sleeping bag rental, and the 4-day route from San Pedro states nothing either way, so ask before you book.

What does not vary is the standard of the refuges. The second-night lodge on the San Pedro route is described as basic with no heating, hot showers work about 75% of the time, and internet access is very limited on day 2. Pack a dry sleeping-bag liner, dry socks and a base layer to sleep in. A liner also adds warmth to a rented bag on a night that runs below the -4°C Uyuni town average in winter.

Small Comforts That Earn Their Weight

A headlamp or head torch is essential for refuge nights, because the second-night dormitory sleeps 2 to 6 and the bathroom is shared. On the 4-day route from San Pedro the listing itself tells passengers to bring toilet paper since it is not always provided at the overnight stops. Add a quick-dry towel, wet wipes, a power bank for charging phones when plugs are scarce, and any personal medication for the 3 days away from Uyuni.

What You Pay in Cash on the Route

The Eduardo Avaroa Andean Fauna National Reserve charges foreign visitors 150 Bs (about $13), cash only, and this fee is usually not included in tour packages. Isla Incahuasi charges around 30 Bs (about $3) per person at a booth at the island's base, also cash. The Termas de Polques hot springs charge around 5 Bs for the changing facilities. On a 3-day route you can hit all three, 185 Bs in total, so 200 Bs (about $18) per person in small boliviano notes covers the entrances with a little margin. The 4-day listing from San Pedro de Atacama suggests 300 Bs for entrances and purchases.

There are no ATMs or cash exchange points near the salt flat. One day-tour listing states this directly and tells passengers to bring cash for entrance fees for that reason. Bolivia runs a dual exchange-rate system: the central bank's official rate was 11.52 Bs per dollar on one sampled day, a higher parallel street rate also exists, and the dollar figures on this page use a market rate of 11.24 Bs.

The Headline Price Is Not the Trip Price

The packing implication of fee exclusions is simple: budget the cash before you leave Uyuni town, because you cannot withdraw it later. The 3-day salt flat and colored lagoons tour lists at $290 with $62 in the booking platform mandatory extras on top, $352 in all, and the park entrances, the sleeping bag rental and the San Pedro transfer are excluded again beyond that. The 3-day Laguna Colorada route lists at $309.90, rises to $319.90 with extras, and separately excludes the 150 Bs reserve fee, the 30 Bs island fee and the optional $25 bus to San Pedro.

The full cost picture is in the Uyuni tour cost guide.

Water and Snacks

Carry more water than you think you need. The 4-day route from San Pedro recommends carrying 5 liters of drinking water. The 3-day San Pedro listing includes water only during meals, and one day-tour listing puts water on its what-to-bring list rather than its inclusions, so fill bottles in Uyuni before you leave.

Bring snacks even when lunch is included. One sunset listing goes as far as naming 1 liter of mineral water and chocolate as not included despite advertising a sunset snack, so read the inclusions carefully. Nuts, biscuits and dried fruit survive a day that swings from about 18°C in the afternoon to near 5°C at night in summer, but finish any dried fruit before a crossing into Chile, where it is commonly barred.

Props for Perspective Photos

The famous forced-perspective photos of the salar need props, and the jeeps carry whatever you bring. Toy dinosaurs, condor figurines, a small bottle, a spare shoe and an empty crisp packet all work, because the flat white surface and the huge sky make a small object look enormous. Two tips: keep props light and unbreakable, since the salt crust averages 8 m thick and is hard, and take a small bag to carry them and any wrappers out with you.

A dry cloth or lens wipe for your phone or camera matters too, because salt dust and spray get on every lens on the flat.

Documents to Carry

Carry your passport in a waterproof sleeve on every tour, not just crossing routes. Day-tour listings name a passport or ID among the items to bring. All foreign travelers must complete Bolivia's SIGEMIG online immigration registration at the official portal before or on arrival, including minors, and non-compliance is fined on exit, so sort that before you board the jeep.

Keep the small cash for fees separate from your passport so you are not opening bags at every booth.

The SAG Rules at the Chilean Border

Anyone entering Chile must declare, under sworn declaration, any plant or animal-origin goods and byproducts they carry, and failure to declare risks fines and confiscation. Commonly barred items include milk, butter, cream and cheese, fresh fruit and vegetables, meats of any kind including cured meats and sausages, seeds, grains and dried fruit, and ornamental plants. That last packed lunch from the Uyuni tour, that piece of fruit in your daypack and that leather souvenir all fall under the declaration duty.

Eat or leave them before the Hito Cajón pass, where Bolivian customs are processed at 4,480 m, and where Chilean formalities are completed 45 km later in San Pedro de Atacama town. The border-crossing details are covered in the San Pedro de Atacama to Uyuni guide.

Tick It Off Before You Leave Uyuni

The list below covers a 3-day route in the dry season, the hardest case. For a one-day loop drop the sleeping bag and the swimsuit, and in the rainy months add the rubber boots if your tour does not supply them.

• A warm jacket, hat and gloves for nights that average -3.7°C to -4.0°C in Uyuni town from June to August, colder at the refuges
• A thin base layer and a fleece, because the salar reaches 11°C to 19.6°C by day depending on the month
• Sunglasses with full UV protection for the glare off the white salt
• High-factor sunscreen, lip balm and a sun hat
• Rubber boots from December to March, unless the listing supplies them as the sunset and starlight tour does
• A sleeping bag, or cash to rent one where the listing excludes it, as on the 3-day salt flat and lagoons tour
• Cash in bolivianos: 150 Bs (about $13) for the Eduardo Avaroa reserve, 30 Bs (about $3) for Incahuasi and around 5 Bs for the Polques changing rooms
• A swimsuit and a small towel for the Polques hot springs
• A headlamp for refuge nights and pre-dawn starts
• Your passport and your SIGEMIG online registration
• Water and snacks for the long drives between stops
• Small props for perspective photos on the flat salt