Plan on about 9 h 7 min of driving for the 456-mile (734 km) trip from Necochea to Fray Bentos, 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: “Traffic fatalities are high in Uruguay.”
| Total distance | 456 mi (734 km) |
|---|---|
| Drive time without stops | 9 h 7 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 |
| Fuel estimate (car at 25 mpg) | about 18.2 gal; actual use varies by vehicle and traffic |
| Stops listed below | 4 |
Border crossing: what to bring for 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.
Driving Necochea to Fray Bentos: the shape of the trip
RP29 (135 mi) and RP6 (73 mi) carry about 46% of the 456 miles. The first 450 miles are in Argentina; the last 6 are in Uruguay. It runs through 3 regions: Buenos Aires, Entre Ríos, Río Negro. None of the 4 stops below is right on the road, so plan each as a short side trip.
Necochea to Fray Bentos: the road sequence
| 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 | 448–451 | 3 | Entre Ríos, Río Negro |
| local roads | 451–456 | 5 | Río Negro |
- Mile 356 of this route: Buenos Aires → Entre Ríos (region line)
- Mile 450 of this route: Entre Ríos → Río Negro (international border)
Stops between Necochea and Fray Bentos
- Nature and outdoors: Museo de Ciencias Naturales Gesué Pedro Noseda (mile 30), Reserva natural Guardia del Juncal (mile 253), Ciervo de los Pantanos National Park (mile 329)
- Museums and history: Museo de Ciencias Naturales Gesué Pedro Noseda (mile 30), Gualeguaychú Cathedral (mile 427)
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
Marsh deer give their name to Ciervo de los Pantanos National Park, a Ramsar Site in Campana, Buenos Aires province, where waterbirds are abundant.
Gualeguaychú Cathedral
St. Joseph's Cathedral, also called Gualeguaychú Cathedral, is the mother church of the Roman Catholic Diocese of Gualeguaychú in Argentina.
When you get to Fray Bentos
Miguel Young Theatre, Fray Bentos
The Miguel Young Theatre in Fray Bentos, Uruguay, was built in 1913 to plans by Antonio Llambías de Olivar.
Museo Luis Alberto Solari
Museo Luis Alberto Solari is a fine arts museum in Fray Bentos, capital of Uruguay's Río Negro department, welcoming the general public, students and foreign visitors.
Frigorífico Anglo del Uruguay
Liebig exported meat extract and corned beef from this spot on the Uruguay River at Fray Bentos starting in 1865. In 1924, the Anglo plant began shipping frozen meat from the same site.
More drives to Fray Bentos
- Florida, Uruguay to Fray Bentos
- Minas to Fray Bentos
- Rivera to Fray Bentos
- Rocha to Fray Bentos
- Melo to Fray Bentos
- Buenos Aires to Fray Bentos, Uruguay
More drives from Necochea
- Necochea to Cariló
- Necochea to Villa Gesell
- Necochea to Chascomús
- Necochea to Magdalena
- Necochea to Tigre
- Necochea to Carmelo, Uruguay
Frequently asked questions
How long is the drive from Necochea to Fray Bentos, Uruguay?
About 9 h 7 min of driving without stops, over 456 miles.
How far is Fray Bentos, Uruguay from Necochea by car?
About 456 miles (734 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 Fray Bentos 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 Fray Bentos 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.
What roads does the drive from Necochea to Fray Bentos use?
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 Fray Bentos?
Closest to the road: Museo de Ciencias Naturales Gesué Pedro Noseda (museum, mile 30, 1 mi from the route); Reserva natural Guardia del Juncal (nature reserve, mile 253, 5 mi from the route); Gualeguaychú Cathedral (cathedral, mile 427, 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.