Plan on about 11 h 34 min of driving for the 557-mile (896 km) trip from Necochea to Conchillas, Uruguay, before any stops. You cross from Argentina into Uruguay at about mile 450, at the Gualeguaychú–Fray Bentos bridge.
Full advisory: Argentina, Uruguay. Advisory issued: Argentina July 10, 2026; Uruguay July 28, 2026; checked October 10, 2026.
On the roads, the State Department says:
- Argentina: “Drivers in Argentina tend to be aggressive, especially in Buenos Aires, and often ignore traffic regulations.”
- Uruguay: “Illumination, pavement markings, and road surfaces for secondary roads can be poor.”
| Distance | 557 mi (896 km) |
|---|---|
| Driving time, no stops | 11 h 34 min |
| Main roads, in order | RP227 → 061-10 → 008-10 → RP29 → RP41 → RN3 → RP6 → RN12 → RN14 → RN136 |
| Border crossing | about mile 450, Argentina → Uruguay (the Gualeguaychú–Fray Bentos bridge) |
| Regions on the route | Buenos Aires, Entre Ríos, Río Negro, Soriano, Colonia |
| Fuel estimate (car at 25 mpg) | about 22.3 gal; actual use varies by vehicle and traffic |
| Stops listed below | 9 |
Crossing from Argentina into Uruguay
The route crosses at about mile 450, at the Gualeguaychú–Fray Bentos bridge, from Entre Ríos into Río Negro. Plan on two checks on each side: immigration for your passport and customs for the car.
| Entering Uruguay (U.S. citizens) | No visa needed for visits of 90 days or less. Passport: must be valid for 6 months beyond your arrival date. |
|---|---|
| Driving in Uruguay | You can drive on your U.S. license. |
| Entering Argentina (U.S. citizens) | No visa needed for visits of 90 days or less. Passport: must be valid when you enter; leave a blank page for the entry and exit stamps. |
| Driving in Argentina | A valid U.S. license usually works; an International Driving Permit is recommended. |
| Rental car | Cross only if the rental company authorizes it in writing and gives you the papers for the border; ask before you book. |
Sources: U.S. State Department, Uruguay (updated August 13, 2026); U.S. State Department, Argentina (updated July 16, 2026). Checked October 10, 2026; rules change, so confirm before you go.
On the road from Necochea to Conchillas
RP29 (135 mi) and RP6 (73 mi) carry about 37% of the 557 miles. The first 450 miles are in Argentina; the last 107 are in Uruguay. It runs through 5 regions: Buenos Aires, Entre Ríos, Río Negro, Soriano, Colonia. Of the 9 stops listed below, 1 are within a mile of the road.
Roads you'll take from Necochea to Conchillas
| Road | Route miles (from–to) | Length, mi | Region |
|---|---|---|---|
| local roads | 0–3 | 3 | Buenos Aires |
| RP227 | 3–54 | 51 | Buenos Aires |
| 061-10 | 54–63 | 9 | Buenos Aires |
| 008-10 | 63–72 | 9 | Buenos Aires |
| RP29 | 72–207 | 135 | Buenos Aires |
| RP41 | 207–237 | 30 | Buenos Aires |
| connecting roads | 237–240 | 3 | Buenos Aires |
| RN3 | 240–265 | 25 | Buenos Aires |
| connecting roads | 265–266 | 1 | Buenos Aires |
| RP6 | 266–339 | 73 | Buenos Aires |
| RN12 | 339–385 | 46 | Buenos Aires, Entre Ríos |
| RN14 | 385–422 | 37 | Entre Ríos |
| local roads | 422–428 | 6 | Entre Ríos |
| RN136 | 428–448 | 20 | Entre Ríos |
| connecting roads | 448–450 | 2 | Entre Ríos |
| local roads | 450–469 | 19 | Río Negro, Soriano |
| connecting roads | 469–471 | 2 | Soriano |
| local roads | 471–557 | 86 | Soriano, Colonia |
- Mile 356 of this route: Buenos Aires → Entre Ríos (region line)
- Mile 450 of this route: Entre Ríos → Río Negro (international border)
- Mile 467 of this route: Río Negro → Soriano (region line)
- Mile 521 of this route: Soriano → Colonia (region line)
Stops between Necochea and Conchillas
- Right off the route (under 1 mile): Museo Municipal Profesor Roselli (mile 520)
- Nature and outdoors: Museo de Ciencias Naturales Gesué Pedro Noseda (mile 30), Reserva natural Guardia del Juncal (mile 254), Ciervo de los Pantanos National Park (mile 329), Agraciada Beach (mile 517)
- Museums and history: Museo de Ciencias Naturales Gesué Pedro Noseda (mile 30), Gualeguaychú Cathedral (mile 427), Calera Real del Dacá (mile 468), Museo Municipal Profesor Roselli (mile 520), Museo del Carmen (mile 535)
Museo de Ciencias Naturales Gesué Pedro Noseda
In the city of Lobería, Buenos Aires Province, the Museo de Ciencias Naturales Gesué Pedro Noseda is a natural sciences museum.
Reserva natural Guardia del Juncal
Guardia del Juncal nature reserve in Cañuelas covers 137 hectares, including a historic estate, the Guardia del Juncal Museum and a natural area; it became a provincial reserve in 2006.
Ciervo de los Pantanos National Park
About 2,500 hectares of wetlands in Campana, Buenos Aires province, are protected as Ciervo de los Pantanos National Park. It's a Ramsar Site and home to the marsh deer and plenty of waterbirds.
Gualeguaychú Cathedral
St. Joseph's Cathedral, also called Gualeguaychú Cathedral, is the mother church of the Roman Catholic Diocese of Gualeguaychú in Argentina.
Calera Real del Dacá
On the eastern edge of Mercedes beside the Dacá stream, the ruins of the Calera Real lime works date to 1722 and are considered the region's first industrial site; recent works added visitor circuits, lighting and interpretive signs.
Agraciada Beach
On the eastern bank of the Uruguay River in Soriano department, Agraciada Beach is a historic beach area facing Argentina's Entre Ríos province.
Museo Municipal Profesor Roselli
Nueva Palmira's municipal museum, also known as the Museo Roselli, is named for its first director, Professor Francisco Lucas Rosselli.
Teatro Uamá
Teatro Uamá is a theater in the city of Carmelo, in Uruguay's Colonia department, regarded as the town's leading cultural institution.
Museo del Carmen
Facing Plaza Artigas in Carmelo, the Archivo y Museo del Carmen belongs to the local Carmelo parish and holds religious and historical collections.
More drives to Conchillas
- Tacuarembó to Conchillas
- Artigas to Conchillas
- Veinticinco de Agosto to Conchillas
- Fray Marcos to Conchillas
- Minas to Conchillas
- Alejandro Gallinal to Conchillas
More drives from Necochea
- Necochea to Cariló
- Necochea to Villa Gesell
- Necochea to Chascomús
- Necochea to Magdalena
- Necochea to Tigre
- Necochea to Fray Bentos, Uruguay
Frequently asked questions
How long is the drive from Necochea to Conchillas, Uruguay?
About 11 h 34 min of driving without stops, over 557 miles.
What is the driving distance from Necochea to Conchillas, Uruguay?
About 557 miles (896 km) on the Wayro route. Other map services may show a few miles more or less, depending on where they start and end in each city.
Where does the Necochea to Conchillas drive cross the border?
At about mile 450, from Argentina into Uruguay, at the Gualeguaychú–Fray Bentos bridge.
What do U.S. citizens need to drive from Necochea into Uruguay?
No visa needed for visits of 90 days or less. Passport: must be valid for 6 months beyond your arrival date. You can drive on your U.S. license. (U.S. State Department, updated August 13, 2026.)
What does the U.S. travel advisory say about the Necochea to Conchillas drive?
The U.S. State Department rates Argentina Level 1: Exercise Normal Precautions; Uruguay Level 2: Exercise Increased Caution. Read the full advisory before you go.
Which highways go from Necochea to Conchillas?
In order: RP227, 061-10, 008-10, RP29, RP41, RN3, RP6, RN12, RN14 and RN136. The road-by-road table above shows the route miles for each one.
Where can you stop on the way from Necochea to Conchillas?
Closest to the road: Museo de Ciencias Naturales Gesué Pedro Noseda (museum, mile 30, 1 mi from the route); Museo Municipal Profesor Roselli (museum, mile 520, 0.8 mi from the route); Teatro Uamá (theater, mile 535, 1 mi from the route). All stops are described above.
How we put this guide together
Wayro calculates the route from OpenStreetMap road data; mile numbers are positions along this route, not highway markers, and "from the route" distances are straight-line, so the real detour depends on access roads. Stops are chosen from parks, natural sites, museums, historic sites and attractions close to the route: at least one strong stop for each stretch of the drive, then the best-known places nearest the road, up to nine in all. Places that are closed, private or not open to visitors are removed. Place descriptions are written by the Wayro team from official park, museum, tourism and government websites and other published sources. Safety levels and entry rules were checked against the U.S. Department of State on October 10, 2026. Conditions change, so check the linked sources before you travel.
Route data © OpenStreetMap contributors.