Plan on about 10 h 49 min of driving for the 532-mile (856 km) trip from Mar del Plata to Nueva Helvecia, Uruguay, before any stops. You cross from Argentina into Uruguay at about mile 421, 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: “Several of the main highways are particularly accident-ridden.”
| Total distance | 532 mi (856 km) |
|---|---|
| Drive time without stops | 10 h 49 min |
| Main roads, in order | RP2 → RN1 → AV1-N → RN9 → RP6 → RN12 → RN14 → RN136 |
| Border crossing | about mile 421, Argentina → Uruguay (the Gualeguaychú–Fray Bentos bridge) |
| Regions on the route | Buenos Aires, Ciudad de Buenos Aires, Entre Ríos, Río Negro, Soriano, Colonia |
| Fuel estimate (car at 25 mpg) | about 21.3 gal; actual use varies by vehicle and traffic |
| Stops listed below | 9 |
The border on the way to Nueva Helvecia
The route crosses at about mile 421, 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.
How the Mar del Plata to Nueva Helvecia drive plays out
RP2 (234 mi) and RN12 (48 mi) carry about 53% of the 532 miles. The first 421 miles are in Argentina; the last 111 are in Uruguay. It runs through 6 regions: Buenos Aires, Ciudad de Buenos Aires, Entre Ríos, Río Negro, Soriano, Colonia. Of the 9 stops listed below, 3 are within a mile of the road.
Road-by-road breakdown: Mar del Plata to Nueva Helvecia
| Road | Route miles (from–to) | Length, mi | Region |
|---|---|---|---|
| local roads | 0–2 | 2 | Buenos Aires |
| RP2 | 2–236 | 234 | Buenos Aires |
| connecting roads | 236–237 | 1 | Buenos Aires |
| RN1 | 237–254 | 17 | Buenos Aires, Ciudad de Buenos Aires |
| local roads | 254–257 | 3 | Ciudad de Buenos Aires |
| AV1-N | 257–263 | 6 | Ciudad de Buenos Aires |
| connecting roads | 263–265 | 2 | Ciudad de Buenos Aires |
| RN9 | 265–304 | 39 | Ciudad de Buenos Aires, Buenos Aires |
| connecting roads | 304–305 | 1 | Buenos Aires |
| RP6 | 305–309 | 4 | Buenos Aires |
| RN12 | 309–357 | 48 | Buenos Aires, Entre Ríos |
| RN14 | 357–393 | 36 | Entre Ríos |
| local roads | 393–400 | 7 | Entre Ríos |
| RN136 | 400–419 | 19 | Entre Ríos |
| connecting roads | 419–421 | 2 | Entre Ríos |
| local roads | 421–532 | 111 | Río Negro, Soriano, Colonia |
- Mile 250 of this route: Buenos Aires → Ciudad de Buenos Aires (region line)
- Mile 266 of this route: Ciudad de Buenos Aires → Buenos Aires (region line)
- Mile 327 of this route: Buenos Aires → Entre Ríos (region line)
- Mile 421 of this route: Entre Ríos → Río Negro (international border)
- Mile 437 of this route: Río Negro → Soriano (region line)
- Mile 501 of this route: Soriano → Colonia (region line)
Places worth a stop between Mar del Plata and Nueva Helvecia
- Right off the route (under 1 mile): National Museum of Oriental Art (mile 256), Tierra Santa (mile 262), ESMA Museum and Site of Memory – Former Clandestine Center of Detention, Torture and Extermination (mile 263)
- Nature and outdoors: Ciervo de los Pantanos National Park (mile 297)
- Museums and history: National Museum of Oriental Art (mile 256), Centro Cultural General San Martín (mile 257), ESMA Museum and Site of Memory – Former Clandestine Center of Detention, Torture and Extermination (mile 263), Museo Histórico Cornelio de Saavedra (mile 265), Gualeguaychú Cathedral (mile 399)
- With kids: Tierra Santa (mile 262)
National Museum of Oriental Art
Created in 1965 and first opened to the public in 1966, this national museum in Buenos Aires preserves and shares art and objects from Asian, African and Oceanian cultures.
Centro Cultural General San Martín
Run by the city government near Corrientes Avenue, the General San Martín Cultural Centre in Buenos Aires hosts a mix of cultural and artistic events.
Monument to Giuseppe Garibaldi
An equestrian statue of Italian military and political figure Giuseppe Garibaldi, this monument stands on Plaza Italia in the Palermo neighborhood of Buenos Aires.
Tierra Santa
Tierra Santa is a religious theme park in the city of Buenos Aires, in Argentina.
ESMA Museum and Site of Memory – Former Clandestine Center of Detention, Torture and Extermination
Set in Buenos Aires on the former Navy Mechanics School grounds, one of the largest clandestine detention, torture and extermination centers of the last dictatorship, this site museum was declared UNESCO World Heritage in 2023.
Museo Histórico Cornelio de Saavedra
Inside Parque General Paz on Avenida Crisólogo Larralde, the Cornelio de Saavedra Historical Museum is a history museum of the City of Buenos Aires.
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.
Frigorífico Anglo del Uruguay
Part of a UNESCO World Heritage landscape inscribed in 2015, the old Anglo meatpacking plant stands on the Uruguay River at Fray Bentos, where frozen meat shipments began in 1924.
More drives to Nueva Helvecia
- Tacuarembó to Nueva Helvecia
- Salto to Nueva Helvecia
- Rivera to Nueva Helvecia
- Artigas to Nueva Helvecia
- Minas to Nueva Helvecia
- Maldonado to Nueva Helvecia
More drives from Mar del Plata
- Mar del Plata to Viedma
- Mar del Plata to Adrogué
- Mar del Plata to Tigre
- Mar del Plata to San Antonio de Areco
- Mar del Plata to Arrecifes
- Mar del Plata to Pergamino
Continue Your Adventure
Frequently asked questions
How long is the drive from Mar del Plata to Nueva Helvecia, Uruguay?
About 10 h 49 min of driving without stops, over 532 miles.
How far is Nueva Helvecia, Uruguay from Mar del Plata by car?
About 532 miles (856 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 Mar del Plata to Nueva Helvecia drive cross the border?
At about mile 421, from Argentina into Uruguay, at the Gualeguaychú–Fray Bentos bridge.
What do U.S. citizens need to drive from Mar del Plata 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.)
Is it safe to drive from Mar del Plata to Nueva Helvecia, Uruguay?
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 Mar del Plata to Nueva Helvecia use?
In order: RP2, RN1, AV1-N, RN9, RP6, RN12, RN14 and RN136. The road-by-road table above shows the route miles for each one.
What are good stops between Mar del Plata and Nueva Helvecia?
Closest to the road: National Museum of Oriental Art (national museum, mile 256, 0.4 mi from the route); Tierra Santa (theme park, mile 262, 0.3 mi from the route); ESMA Museum and Site of Memory – Former Clandestine Center of Detention, Torture and Extermination (museum, mile 263, 0.2 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.