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Eduardo Avaroa Andean Fauna National Reserve (Reserva Nacional de Fauna Andina Eduardo Avaroa) sits in the far southwest corner of Bolivia's Potosí department, straddling the tri-border area where Bolivia, Chile, and Argentina converge at high altitude. Established in 1973 and covering roughly 7,147 km², it is Bolivia's most-visited national park and one of the highest protected areas on Earth, with most of its terrain sitting above 4,200 m (13,800 ft).
The reserve is not a conventional destination with hotels and restaurants — it is a raw wilderness circuit, almost always explored aboard expedition-grade 4WD vehicles with local guides departing from Uyuni or Tupiza. The landscape is astonishing in its variety: mineral-stained lagoons of red, green, and white; active fumaroles; dormant volcanoes; wind-sculpted rock formations; and vast salt flats. All three Andean flamingo species — Andean, James's, and Chilean — breed and feed in the reserve's lagoons.
The name honors Eduardo Avaroa, a Bolivian hero of the War of the Pacific (1879), and the reserve carries quiet national significance beyond its ecological importance. Crossing into Chile via the Hito Cajón border post (near the Sol de Mañana geysers) or approaching Argentina via the Villazón–La Quiaca corridor are options some travelers incorporate into multi-country itineraries.
Key zones within the reserve:
- Laguna Colorada — the red-hued shallow lake famous for flamingo colonies
- Sol de Mañana — a high-altitude geothermal field at roughly 5,000 m with boiling mud pools and steam vents
- Laguna Verde and Laguna Blanca — mineral lakes near the Chilean border at the foot of Licancabur volcano
- Desierto de Dalí — an eroded red-rock landscape evoking surrealist paintings
- Laguna Hedionda — a saline lake with large flamingo concentrations
Before You Go
Visas and entry
Entry requirements for Bolivia, Chile, and Argentina vary by nationality. Do not rely on a single source — check TravelerPulse's Visas section and the official immigration authorities of each country you plan to enter before travel.
Altitude and acclimatization
This is the reserve's most serious practical consideration. The terrain sits between roughly 4,200 m and 5,000 m. Acute mountain sickness (AMS) is a genuine risk. Spend at least two nights in Uyuni (3,670 m) or another high-altitude town acclimatizing before entering the reserve. Symptoms include headache, nausea, dizziness, and fatigue. Descent is the definitive treatment. Consult a physician before travel, particularly if you have cardiovascular or respiratory conditions. Some travelers use acetazolamide (Diamox) — discuss this with a doctor.
What to bring
Temperature swings are extreme. Days can reach 15–20 °C in dry season; nights regularly drop well below freezing year-round. Pack layered thermals, a quality windproof/waterproof outer layer, sun protection (UV exposure is intense at altitude), sunglasses, lip balm, and warm gloves. A headlamp is essential for early geyser visits. Bring all cash you need — there are no ATMs or card readers in the reserve. Pack snacks and water purification options; most guides provide meals and water on multi-day tours but confirm this at booking.
Health and insurance
Ensure your travel insurance explicitly covers high-altitude trekking and medical evacuation. The nearest hospitals with meaningful capacity are in Uyuni and Tupiza. Tap water in the reserve is not potable.
Getting There
From Uyuni (Bolivia) — the primary gateway
Uyuni is the overwhelming majority of visitors' starting point. It is reachable by overnight bus from La Paz (approximately 10–12 hours, verify current schedules with operators), by regional flights from La Paz (verify availability and operators locally or via booking platforms), or by train from Oruro. From Uyuni, virtually all visitors join an organized 3-day/2-night 4WD tour that crosses the Salar de Uyuni salt flat before entering the reserve. Independent vehicle hire is possible but requires experience with high-altitude off-road driving, self-sufficiency, and knowledge of permit requirements.
From Tupiza (Bolivia)
Tupiza, to the south, offers an alternative 4-day/3-night circuit in reverse, passing through the reserve and ending in Uyuni or vice versa. It is less commonly chosen but offers additional scenery through the Chichas range.
Cross-border approaches
- From Chile: The Hito Cajón border crossing (Bolivia–Chile) near San Pedro de Atacama is an option for travelers doing a Chile-to-Bolivia crossing. Road conditions, crossing hours, and seasonal closures vary — verify with the relevant border authorities and tour operators before planning this route.
- From Argentina: Some operators offer circuits that begin or end near the Bolivian–Argentine border (Villazón/La Quiaca); confirm logistics locally.
Permits and fees
Bolivia's national park entry fee (payable in Bolivianos at the reserve entrance) is required. Verify the current amount at the reserve entrance or with your tour operator; fees change periodically and must be paid in cash.
Getting Around
Movement inside the reserve is almost exclusively by 4WD vehicle. There is no public transportation, no paved roads, and tracks can be obliterated by snowfall or seasonal flooding. During the wet season (roughly November–March) some roads become impassable for days at a time, and tours may be cancelled or rerouted.
The standard 3-day tour covers approximately 500–700 km of off-road terrain. Drivers double as guides and are knowledgeable about road conditions. If you have booked a tour, logistics are handled for you. Independent travelers should carry a detailed topographic map, a GPS device, a satellite communicator, sufficient fuel (carry reserves), full vehicle recovery equipment, and emergency food and water for several days — there are no fuel stations inside the reserve.
At Sol de Mañana, visitors walk among the geothermal features on foot. Stay strictly on marked paths — the ground crust above boiling mud pools can be thin and collapses have caused serious injuries and fatalities in the past.
Where to Stay
Accommodation within the reserve is limited to simple, unheated refugios (basic guesthouses) run by local communities, primarily at Laguna Colorada. Conditions are spartan: dormitory-style sleeping, limited electricity (often solar or generator for a few hours), basic cold-water or unheated bathroom facilities, and thin mattresses. Bring a sleeping bag rated to at least -10 °C.
Most tour operators include accommodation in their multi-day tour packages. Confirm exactly what is included — bedding, meals, water, and park fees — before booking. There is no luxury accommodation within the reserve.
In Uyuni (before and after the tour), there is a range of accommodation from budget hostels to mid-range hotels. Verify current options and availability through booking platforms or travel agents, as properties open and close over time.
Things to See & Do
Laguna Colorada
The reserve's centerpiece is a shallow (rarely more than 0.5 m deep) salt lake whose vivid red-to-brick coloration comes from algae, sediment pigments, and the feeding activity of thousands of flamingos. Early morning visits (before wind disturbs the surface) offer the most photogenic reflections. A short walking trail loops around a viewing area. This is usually the overnight base on 3-day tours, with basic refugios nearby.
Sol de Mañana Geothermal Field
Visited at dawn when steam is most dramatic, this active geothermal zone at approximately 5,000 m features boiling mud pools, sulfurous fumaroles, and steam vents. The combination of altitude and sulfur fumes can be disorienting — move slowly and heed guide instructions. Remain on designated paths at all times.
Laguna Verde and Laguna Blanca
These two contrasting lakes near the Chilean border sit at the foot of Licancabur volcano (5,920 m). Laguna Verde's intense turquoise-green color is caused by copper and arsenic mineral concentrations and is most vivid when winds stir the lake. Laguna Blanca is calmer and paler. The volcanic backdrop makes this one of the reserve's most photographed spots.
Flamingo watching
All three Andean flamingo species — Andean (Phoenicoparrus andinus), James's (Phoenicoparrus jamesi), and Chilean (Phoenicopterus chilensis) — are present. James's flamingo is globally vulnerable and the reserve is one of its most important breeding sites. Bring binoculars; respectful distance is essential, and guides will advise on approach.
Desierto de Dalí
An informal name for a stretch of wind-eroded volcanic rock formations colored in reds, oranges, and purples. The surreal topography is a popular photography stop. There is no formal trail; tours stop briefly at recognized viewpoints.
Laguna Hedionda
A large salt lake (hedionda means 'smelly' — the sulfur is noticeable) with one of the reserve's densest flamingo populations. Often included on day one or two of the standard circuit.
Food & Drink
Food inside the reserve is provided entirely by tour operators or the refugios attached to the overnight stops. Meals are typically simple, filling, and high-carbohydrate — soups, rice, pasta, potatoes, and eggs are common. Vegetarian requirements can usually be accommodated with advance notice; inform your operator at booking.
Hydration is critical at altitude. Drink more water than you feel you need — dehydration accelerates AMS symptoms. Coca tea (mate de coca) is widely offered at refugios and is a traditional Andean remedy for altitude discomfort; many travelers find it helps. Carry personal snacks (nuts, dried fruit, energy bars) for between meals and as emergency supplies.
Alcohol should be consumed very sparingly or avoided entirely at altitude, as it accelerates dehydration and impairs your body's ability to acclimatize.
Practical Information
Cash
Carry all the Bolivianos you will need for the entire trip before leaving Uyuni. There are no ATMs, money changers, or card payment options inside the reserve. Park entry fees and any community contributions must be paid in cash.
Connectivity
Mobile signal is absent for most of the reserve. Do not rely on smartphones for navigation or communication. Inform someone of your itinerary before departure. Satellite communicators (e.g., Garmin inReach or similar) are a sensible precaution for independent travelers.
Photography
Light at altitude is intense and unfiltered. A polarizing filter improves lagoon and sky colors. Bring more memory and battery capacity than you think you need — cold temperatures drain batteries faster. Charge devices whenever generator power is available at refugios.
Emergency contacts
Emergency services are very limited within the reserve. The nearest substantive medical care is in Uyuni or Tupiza. Bolivia's national emergency number is 911, but cell coverage does not exist in the reserve — verify locally what emergency protocols your tour operator has in place before departure.
Time and planning
The standard tour departs Uyuni early in the morning (often 07:00–08:00). Tours are typically booked 1–3 days in advance in Uyuni, though booking ahead from La Paz is advisable in peak season (June–August). Prices and inclusions vary significantly between operators — compare at least three options.
Safety
Altitude sickness is the primary safety risk and should be taken seriously. Do not ascend if you have significant AMS symptoms; no photograph or itinerary is worth your health. Descend immediately if symptoms worsen.
The Sol de Mañana geothermal field has caused injuries and fatalities when visitors have left marked paths. The ground crust can be extremely thin. Follow your guide's instructions precisely and keep children within arm's reach.
Road conditions within the reserve can be hazardous — soft sand, river crossings, unmarked tracks, and sudden weather changes including whiteout conditions in wet season. Choose operators with modern, well-maintained 4WD vehicles and experienced drivers.
UV radiation at altitude is severe. Sunburn can occur within 30 minutes even on overcast days. Apply high-SPF sunscreen to all exposed skin, including lips, and wear UV-protective clothing and quality sunglasses.
Wildlife, including flamingos, vicuñas, and vizcachas, should not be approached closely or fed. Maintain respectful distances and follow Leave No Trace principles — the ecosystem is fragile and the impact of increased tourism is a recognized concern for park authorities.
Local Culture & Etiquette
The reserve sits within the ancestral territory of Aymara and Quechua-speaking communities whose connection to this altiplano landscape long predates the national park designation. Local community members operate many of the refugios inside the reserve and employ drivers and guides — choosing community-linked operators where possible is a meaningful way to support local livelihoods.
The salt and mineral lagoons have cultural significance in Andean cosmology, and flamingos appear in local textiles and oral traditions across the Bolivian altiplano. Visitors should be respectful of these connections and avoid treating the landscape as purely a photographic backdrop.
The park is named for Eduardo Avaroa, a Bolivian civilian who died defending the port of Calama during the Chilean advance in 1879's War of the Pacific. His last words — reportedly a defiant refusal to surrender — are well-known in Bolivia. The name is a reminder that this landscape also carries political and historical weight for Bolivians, particularly given Bolivia's long-standing landlocked status since the same conflict.
