By road, San Antonio de Areco and Fray Marcos, Uruguay are about 362 miles (582 km) apart, or roughly 7 h 52 min of driving. You cross from Argentina into Uruguay at about mile 144, 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 | 362 mi (582 km) |
|---|---|
| Drive time without stops | 7 h 52 min |
| Main roads, in order | RN8 → RN193 → RN12 → RN14 → RN136 |
| Border crossing | about mile 144, Argentina → Uruguay (the Gualeguaychú–Fray Bentos bridge) |
| Regions on the route | Buenos Aires, Entre Ríos, Río Negro, Soriano, Colonia, San José, Canelones, Florida |
| Fuel estimate (car at 25 mpg) | about 14.5 gal; actual use varies by vehicle and traffic |
| Stops listed below | 8 |
Border crossing: what to bring for Uruguay
The route crosses at about mile 144, 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 San Antonio de Areco to Fray Marcos drive plays out
RN12 (49 mi) and RN14 (37 mi) carry about 24% of the 362 miles. The first 144 miles are in Argentina; the last 218 are in Uruguay. It runs through 8 regions: Buenos Aires, Entre Ríos, Río Negro, Soriano, Colonia, San José, Canelones, Florida. Of the 8 stops listed below, 3 are within a mile of the road.
San Antonio de Areco to Fray Marcos: the road sequence
| Road | Route miles (from–to) | Length, mi | Region |
|---|---|---|---|
| local roads | 0–4 | 4 | Buenos Aires |
| RN8 | 4–10 | 6 | Buenos Aires |
| RN193 | 10–30 | 20 | Buenos Aires |
| RN12 | 30–79 | 49 | Buenos Aires, Entre Ríos |
| RN14 | 79–116 | 37 | Entre Ríos |
| local roads | 116–122 | 6 | Entre Ríos |
| RN136 | 122–142 | 20 | Entre Ríos |
| connecting roads | 142–144 | 2 | Entre Ríos |
| local roads | 144–241 | 97 | Río Negro, Soriano |
| connecting roads | 241–242 | 1 | Soriano |
| local roads | 242–278 | 36 | Colonia, San José |
| connecting roads | 278–281 | 3 | San José |
| local roads | 281–324 | 43 | San José, Canelones |
| connecting roads | 324–327 | 3 | Canelones |
| local roads | 327–334 | 7 | Canelones |
| connecting roads | 334–335 | 1 | Canelones |
| local roads | 335–362 | 27 | Canelones, Florida |
- Mile 50 of this route: Buenos Aires → Entre Ríos (region line)
- Mile 144 of this route: Entre Ríos → Río Negro (international border)
- Mile 160 of this route: Río Negro → Soriano (region line)
- Mile 242 of this route: Soriano → Colonia (region line)
- Mile 259 of this route: Colonia → San José (region line)
- Mile 303 of this route: San José → Canelones (region line)
- Mile 360 of this route: Canelones → Florida (region line)
Where to stop on the way to Fray Marcos
- Right off the route (under 1 mile): Teatro Macció (mile 279), Museo Departamental de San José (mile 279), Cathedral of Our Lady of Guadalupe (mile 313)
- Nature and outdoors: Ciervo de los Pantanos National Park (mile 32)
- Museums and history: Gualeguaychú Cathedral (mile 122), Alejandro Berro Paleontology Museum (mile 159), Calera Real del Dacá (mile 162), Museo Departamental de San José (mile 279), Cathedral of Our Lady of Guadalupe (mile 313)
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, serves as the cathedral church of the Roman Catholic Diocese of Gualeguaychú in Argentina.
Frigorífico Anglo del Uruguay
The former Anglo meatpacking plant on the Uruguay River at Fray Bentos began shipping frozen meat in 1924, on the site where Liebig exported meat extract and corned beef from 1865. It is part of a UNESCO World Heritage landscape inscribed in 2015.
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.
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.
Teatro Macció
San José de Mayo's Teatro Bartolomé Macció is a traditional theater, regarded as the city's most important building architecturally and declared a Historic Monument of Uruguay in 1984.
Museo Departamental de San José
Set in central San José de Mayo, the Museo Departamental de San José is a history and fine arts museum that also runs a library, archives and cultural programs.
Cathedral of Our Lady of Guadalupe
Construction of Canelones' Cathedral of Our Lady of Guadalupe began in 1816; the church became a cathedral in 1961 and Uruguay's national shrine of Our Lady of Guadalupe in 2020.
More drives to Fray Marcos
- Nueva Helvecia to Fray Marcos
- Colonia del Sacramento to Fray Marcos
- Carmelo to Fray Marcos
- Paysandú to Fray Marcos
- Rivera to Fray Marcos
- Salto to Fray Marcos
More drives from San Antonio de Areco
- San Antonio de Areco to Magdalena
- San Antonio de Areco to Capilla del Monte
- San Antonio de Areco to Atlántida, Uruguay
- San Antonio de Areco to Punta del Diablo, Uruguay
Frequently asked questions
How long does it take to drive from San Antonio de Areco to Fray Marcos, Uruguay?
About 7 h 52 min of driving without stops, over 362 miles.
What is the driving distance from San Antonio de Areco to Fray Marcos, Uruguay?
About 362 miles (582 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 San Antonio de Areco to Fray Marcos drive cross the border?
At about mile 144, from Argentina into Uruguay, at the Gualeguaychú–Fray Bentos bridge.
What do U.S. citizens need to drive from San Antonio de Areco 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 San Antonio de Areco to Fray Marcos, 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 San Antonio de Areco to Fray Marcos use?
In order: RN8, RN193, 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 San Antonio de Areco to Fray Marcos?
Closest to the road: Museo Departamental de San José (history museum, mile 279, 0.7 mi from the route); Teatro Macció (theater, mile 279, 0.8 mi from the route); Cathedral of Our Lady of Guadalupe (cathedral, mile 313, 0.3 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.