The Wayro route from Chascomús to Mercedes, Uruguay is 263 miles (423 km), about 5 h 16 min of driving without stops. You cross from Argentina into Uruguay at about mile 244, 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: “If you are in an accident involving injury, stay in place until a police officer arrives.”
| Distance by road | 263 mi (423 km) |
|---|---|
| Time at the wheel, no stops | 5 h 16 min |
| Main roads, in order | RP2 → RN1 → AV1-N → RN9 → RP6 → RN12 → RN14 → RN136 |
| Border crossing | about mile 244, Argentina → Uruguay (the Gualeguaychú–Fray Bentos bridge) |
| Regions on the route | Buenos Aires, Ciudad de Buenos Aires, Entre Ríos, Río Negro, Soriano |
| Fuel estimate (car at 25 mpg) | about 10.5 gal; actual use varies by vehicle and traffic |
| Stops listed below | 8 |
Getting across the Argentina–Uruguay border
The route crosses at about mile 244, 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 Chascomús to Mercedes drive plays out
RP2 (55 mi) and RN12 (47 mi) carry about 39% of the 263 miles. The first 244 miles are in Argentina; the last 19 are in Uruguay. It runs through 5 regions: Buenos Aires, Ciudad de Buenos Aires, Entre Ríos, Río Negro, Soriano. Of the 8 stops listed below, 3 are within a mile of the road.
Chascomús to Mercedes: the road sequence
| Road | Route miles (from–to) | Length, mi | Region |
|---|---|---|---|
| local roads | 0–4 | 4 | Buenos Aires |
| RP2 | 4–59 | 55 | Buenos Aires |
| connecting roads | 59–60 | 1 | Buenos Aires |
| RN1 | 60–76 | 16 | Buenos Aires, Ciudad de Buenos Aires |
| local roads | 76–80 | 4 | Ciudad de Buenos Aires |
| AV1-N | 80–85 | 5 | Ciudad de Buenos Aires |
| connecting roads | 85–88 | 3 | Ciudad de Buenos Aires |
| RN9 | 88–127 | 39 | Buenos Aires |
| RP6 | 127–132 | 5 | Buenos Aires |
| RN12 | 132–179 | 47 | Buenos Aires, Entre Ríos |
| RN14 | 179–216 | 37 | Entre Ríos |
| local roads | 216–222 | 6 | Entre Ríos |
| RN136 | 222–241 | 19 | Entre Ríos |
| connecting roads | 241–244 | 3 | Entre Ríos |
| local roads | 244–263 | 19 | Río Negro, Soriano |
- Mile 72 of this route: Buenos Aires → Ciudad de Buenos Aires (region line)
- Mile 88 of this route: Ciudad de Buenos Aires → Buenos Aires (region line)
- Mile 150 of this route: Buenos Aires → Entre Ríos (region line)
- Mile 244 of this route: Entre Ríos → Río Negro (international border)
- Mile 260 of this route: Río Negro → Soriano (region line)
Stops between Chascomús and Mercedes
- Right off the route (under 1 mile): Museum of Contemporary Art of Buenos Aires (mile 76), Basilica of Our Lady of the Pillar, Buenos Aires (mile 80), Parque de la Memoria (mile 84)
- Nature and outdoors: Parque de la Memoria (mile 84), Parque Natural Municipal Ribera Norte (mile 91)
- Museums and history: Museum of Contemporary Art of Buenos Aires (mile 76), Basilica of Our Lady of the Pillar, Buenos Aires (mile 80), Xul Solar Museum (mile 80), Sarmiento Historical Museum (mile 84), Museo Histórico Cornelio de Saavedra (mile 88)
Museum of Contemporary Art of Buenos Aires
Often called MACBA, the Museum of Contemporary Art of Buenos Aires is an art museum in the city's San Telmo neighborhood.
Basilica of Our Lady of the Pillar, Buenos Aires
Built as part of a Franciscan monastery and completed in 1732, the Basilica of Our Lady of the Pillar in Recoleta has served as a parish church since the Franciscans were expelled in 1821.
Xul Solar Museum
Dedicated to Argentine painter Alejandro Xul Solar, the Xul Solar Museum preserves and shares his work and promotes culture in its many forms.
Sarmiento Historical Museum
In the Belgrano neighborhood of Buenos Aires, the Sarmiento Historical Museum covers the Generation of '80 and the life of President Domingo Faustino Sarmiento, with sections on Nicolás Avellaneda and the 1880 federalization.
Parque de la Memoria
Facing the Río de la Plata at the northern end of Buenos Aires' Belgrano section, Parque de la Memoria is a public memorial to the victims of Argentina's 1976–1983 military regime.
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.
Parque Natural Municipal Ribera Norte
On the Río de la Plata shore in Acassuso, San Isidro, Ribera Norte is a municipal nature park protecting green space within greater Buenos Aires.
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.
Arriving in Mercedes
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.
Cathedral of Mercedes
Dedicated to Our Lady of Mercy, this cathedral is the main Catholic church of Mercedes, Uruguay, and has been the seat of the Diocese of Mercedes since 1960.
Alejandro Berro Paleontology Museum
In a 19th-century building in Mercedes' Parque Castillo Mauá, this paleontology museum opened in 1946 around the collection of naturalist Alejandro Berro; a well-preserved glyptodon shell found on a nearby riverbank is a highlight.
More drives to Mercedes
- Salto to Mercedes, Uruguay
- Rivera to Mercedes, Uruguay
- Artigas to Mercedes, Uruguay
- Montevideo to Mercedes, Uruguay
- Melo to Mercedes, Uruguay
- Buenos Aires to Mercedes, Uruguay
More drives from Chascomús
- Chascomús to Tigre
- Chascomús to San Antonio de Areco
- Chascomús to Arrecifes
- Chascomús to Martínez
- Chascomús to Mercedes, Argentina
- Chascomús to Artigas, Uruguay
Continue Your Adventure
Frequently asked questions
How long does it take to drive from Chascomús to Mercedes, Uruguay?
About 5 h 16 min of driving without stops, over 263 miles.
What is the driving distance from Chascomús to Mercedes, Uruguay?
About 263 miles (423 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 Chascomús to Mercedes drive cross the border?
At about mile 244, from Argentina into Uruguay, at the Gualeguaychú–Fray Bentos bridge.
What do U.S. citizens need to drive from Chascomús 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 Chascomús to Mercedes, 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 Chascomús to Mercedes 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.
Where can you stop on the way from Chascomús to Mercedes?
Closest to the road: Museum of Contemporary Art of Buenos Aires (contemporary art museum, mile 76, 0.3 mi from the route); Basilica of Our Lady of the Pillar, Buenos Aires (catholic parish church, mile 80, 0.6 mi from the route); Parque de la Memoria (memorial park, mile 84, 0.4 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.