There is no motorway to the Iberá Wetlands, and that is the single most important thing to understand before you book anything. Argentina's second largest protected wetland sits in the middle of Corrientes province, reached by provincial routes, long gravel roads and a bus that runs three days a week. Getting there takes planning. It also takes about a day. Here is exactly how to do it, whichever way you travel.
First decide the portal, then the route
Iberá is not a single entrance, and the layers of protection here confuse almost everyone at first, so it is worth thirty seconds of admin.
At the core is Iberá National Park, 195,094 hectares created in 2018 by national law 27,481, largely on former cattle ranches donated by Tompkins Conservation. The national park has four portals with independent entrances: Cambyretá, San Nicolás, Carambola and Laguna Iberá. That sits inside the far larger Iberá Natural Reserve, declared by the province of Corrientes in 1983 and covering about 1.3 million hectares, of which roughly 600,000 form the Iberá Provincial Park.
Counting national and provincial land together, ten public-access gateways have been opened around the wetland, linked by a scenic route of more than 1,000 kilometres and some 500 kilometres of gravel road. So when you read "four portals" on the national park website and "ten portals" everywhere else, both are right: they are counting different things.
Those gateways are hours apart. The route you take depends entirely on which one you choose, so pick the portal first.
For most first-time visitors the answer is Colonia Carlos Pellegrini, the small village at the Laguna Iberá portal. It has the widest choice of lodges, guides and boat trips, and the wildlife on the lagoon is spectacular and easy to reach. Everything below uses Pellegrini as the reference point, with the other main portals covered further down.
From Buenos Aires
Driving
It is roughly 860 kilometres from Buenos Aires to Carlos Pellegrini: national route 14, then national route 119 to the town of Mercedes, then provincial route 40 for the final leg. Almost all of it is good asphalt until Mercedes.
Then comes the part everyone asks about. From Mercedes to Carlos Pellegrini is 120 kilometres: 40 of asphalt and 80 of gravel and dirt. In dry conditions any ordinary car can do it with care. After heavy rain the surface deteriorates fast and a high-clearance vehicle or 4x4 becomes genuinely useful.
Plan on nine to eleven hours of driving in total. Many travellers break the journey with a night in Mercedes, or in Colón or Concordia in Entre Ríos.
By bus
Long-distance buses run nightly from Retiro terminal in Buenos Aires to Mercedes, operated by companies including Flechabus, Rápido Tata, ERSA and Águila Dorada. Most depart from around 21:00 and arrive in the morning. Mercedes is also connected by long-distance bus to Corrientes city and Paso de los Libres.
From Mercedes you have two ways to cover the last 120 kilometres:
- Iberá Bus, a scheduled minibus service, leaves Mercedes on Mondays, Wednesdays and Fridays around midday and returns from Pellegrini on those same days at 3:30 in the morning. Sources differ between noon and 13:00 for the departure, so confirm the time when you book your lodging.
- A private transfer, which runs any day and takes about three hours. Operators meet the overnight buses. If you would rather not take your own car onto the gravel, you can leave it in a car park in Mercedes and pick up a transfer there.
Flying
There is no airport at the wetland. The two useful ones are Posadas (Misiones) and Corrientes city, both served from Buenos Aires by Aerolíneas Argentinas, with Flybondi also flying to Posadas. From Carlos Pellegrini, Posadas is about 200 kilometres away and Corrientes city about 370. From either you continue by hire car or transfer.
Flying makes most sense if you are heading for the northern portals, or combining Iberá with Iguazú Falls.
If you are choosing between the two airports, think about which portal you want, not which flight is cheapest. Posadas is the natural gateway to the north of the park; Corrientes city serves the north-west. For Carlos Pellegrini in the centre-south, the overnight bus to Mercedes is often simpler and cheaper than any flight.
The other portals
The national park authority publishes access details for each gateway. The essentials:
- Cambyretá (north). Reached from the town of Ituzaingó: the access road leaves national route 12 at km 1242, 15 kilometres south of Ituzaingó and 8 kilometres north of Villa Olivari. From there it is 29 kilometres of gravel, passable in any vehicle. The road crosses private farmland, so you will need to get out to open and close the gates and leave them as you found them. There is no public transport to the portal. Ituzaingó itself is 85 kilometres from Posadas international airport.
- Carambola (centre-north). The reference town is Concepción, 190 kilometres from Corrientes city by national routes 12 and 118 and provincial route 6, followed by 27 kilometres of gravel and dirt, fine for any vehicle. Concepción is reachable by long-distance bus from Corrientes.
- San Nicolás (north-west). The reference town is San Miguel, 166 kilometres from Corrientes city by provincial route 5 and national route 118, then 27 kilometres of sand and dirt. This is the one portal where a 4x4 is genuinely restricted-access, especially after rain, and there is no mobile signal on the final stretch. No public transport.
- Laguna Iberá (centre-south). Carlos Pellegrini, as above. There are also two longer approaches if you are coming from elsewhere in the region: 145 kilometres of gravel and dirt from the north via provincial route 41 and route 40 from national route 12, or 122 kilometres of gravel and dirt from the north-east via route 40 where it meets national route 14.
In normal conditions, Cambyretá, Carambola and Laguna Iberá are all reachable in an ordinary car. San Nicolás is the exception.
The gravel road, honestly
Nearly every portal ends in unpaved road, and that stretch is where trips go wrong. What actually matters:
- Check the road condition a day or two before, with your lodge or guide. They drive it constantly and will tell you straight whether an ordinary car will make it.
- Travel in daylight. Wildlife crosses these roads and there is no lighting, no signal and no help nearby.
- Fill the tank in the last proper town. There is no fuel station between Mercedes and Carlos Pellegrini, and none in the village itself.
- Carry cash. Banking services in the small villages are minimal and card acceptance is patchy, so do not count on withdrawing money once you are inside the wetland.
- Allow more time than the distance suggests. Eighty kilometres of gravel is a two to three hour drive, not a one hour one.
Do not treat the gravel as a toll you pay to arrive. It is where the trip starts. Leave early, drive slowly, and you will cross rheas, capybaras and quite possibly a marsh deer before you have officially entered the park at all.
Arriving without a car
Every portal has local operators running transfers from the nearest towns, and for the northern gateways with no public transport, that is the only way in short of driving yourself. They are small local businesses rather than a booking platform, so you contact them directly.
That is exactly what the free Iberá Experience app is for: choose your portal and you get every transfer operator, guide, lodge and boat trip listed for it, with a working phone number for each. Once you know the portal, where to stay goes through the lodging at each one.
Frequently asked questions
How do you get to the Iberá Wetlands from Buenos Aires?
Drive about 860 kilometres via routes 14 and 119 to Mercedes and then provincial route 40, or take an overnight bus from Retiro to Mercedes and continue by scheduled minibus or private transfer. Total travel time is around a day either way.
Is the road to Carlos Pellegrini paved?
Only partly. From Mercedes it is 120 kilometres in total: 40 of asphalt and 80 of gravel and dirt. Ordinary cars manage in dry weather; after heavy rain a high-clearance vehicle or 4x4 is advisable.
Is there public transport to the Iberá Wetlands?
To Carlos Pellegrini, yes: the Iberá Bus runs from Mercedes on Mondays, Wednesdays and Fridays around midday, returning at 3:30 am on those days. The northern portals of Cambyretá and San Nicolás have no public transport at all.
What is the nearest airport to the Iberá Wetlands?
Posadas and Corrientes city. From Carlos Pellegrini, Posadas is roughly 200 kilometres away and Corrientes about 370. Both are served from Buenos Aires by Aerolíneas Argentinas, and Posadas also by Flybondi.
Do I need a 4x4 to visit Iberá?
Not usually. Cambyretá, Carambola and Laguna Iberá are all accessible in an ordinary car when the roads are in normal condition. San Nicolás is the exception and does require a 4x4, and any portal can become difficult after sustained rain.
How long does the trip take from Mercedes?
About three hours for the 120 kilometres, whether you drive yourself or take a transfer. The gravel section is slow by design.
Iberá Experience is the free guide app to the Ibera Wetlands. It shows you which of the ten gateway portals to choose, where to stay, and who runs the boat safaris, birding walks and transfers, with direct contact for each one. No sign-up, and it works straight from your browser. Start at iberaexperience.com.
Sources, last checked July 2026: portal-by-portal access, road surfaces, distances and public transport (Administración de Parques Nacionales, argentina.gob.ar/parquesnacionales/ibera); Buenos Aires route, bus companies and airport distances (Cámara de Turismo de los Esteros del Iberá); national park area of 195,094 ha, law 27,481/18, its four portals and the 1983 provincial reserve (Administración de Parques Nacionales, ficha del área protegida); donated land, the ten public-access gateways and the scenic route (Rewilding Argentina). Road conditions change with rainfall and bus timetables change seasonally: confirm both locally before travelling.
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