Plan on about 8 h 20 min of driving for the 404-mile (650 km) trip from Chascomús to Veinticinco de Agosto, Uruguay, before any 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: “Several of the main highways are particularly accident-ridden.”
| Total distance | 404 mi (650 km) |
|---|---|
| Time at the wheel, no stops | 8 h 20 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, Colonia, San José, Florida |
| Fuel estimate (car at 25 mpg) | about 16.2 gal; actual use varies by vehicle and traffic |
| Stops listed below | 8 |
Crossing from Argentina into Uruguay
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.
Driving Chascomús to Veinticinco de Agosto: the shape of the trip
RP2 (55 mi) and RN12 (47 mi) carry about 25% of the 404 miles. The first 244 miles are in Argentina; the last 160 are in Uruguay. It runs through 8 regions: Buenos Aires, Ciudad de Buenos Aires, Entre Ríos, Río Negro, Soriano, Colonia, San José, Florida. Of the 8 stops listed below, 4 are within a mile of the road.
Chascomús to Veinticinco de Agosto: 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 | 244–341 | 97 | Río Negro, Soriano |
| connecting roads | 341–342 | 1 | Soriano |
| local roads | 342–378 | 36 | Colonia, San José |
| connecting roads | 378–381 | 3 | San José |
| local roads | 381–404 | 23 | San José |
- 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)
- Mile 342 of this route: Soriano → Colonia (region line)
- Mile 359 of this route: Colonia → San José (region line)
- Mile 404 of this route: San José → Florida (region line)
Stops between Chascomús and Veinticinco de Agosto
- Right off the route (under 1 mile): Santo Domingo Convent (mile 77), Errázuriz Palace (mile 81), Cathedral of Mercedes (mile 262), Cathedral of San José de Mayo (mile 378)
- Museums and history: Museum of Foreign Debt (mile 79), Errázuriz Palace (mile 81), Sarmiento Historical Museum (mile 84), San Isidro Cathedral (mile 91), Gualeguaychú Cathedral (mile 221), Cathedral of Mercedes (mile 262), Cathedral of San José de Mayo (mile 378)
Santo Domingo Convent
Dating from colonial times, the Santo Domingo Convent in Buenos Aires's Monserrat neighborhood saw fighting during the British invasions of the Río de la Plata.
Museum of Foreign Debt
Inside the University of Buenos Aires Faculty of Economic Sciences, the Museum of Foreign Debt is a public museum showing how foreign debt has shaped Argentina's economic development.
Errázuriz Palace
Once one of the most elegant private homes in Buenos Aires, Errázuriz Palace (Palacio Errázuriz) has housed the National Museum of Decorative Art since 1937.
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.
San Isidro Cathedral
Main church of the Diocese of San Isidro, this cathedral stands on Del Libertador Avenue opposite Plaza Mitre, in the historic quarter of San Isidro in Buenos Aires province.
Gualeguaychú Cathedral
St. Joseph's Cathedral, also called Gualeguaychú Cathedral, is the mother church of the Roman Catholic Diocese of Gualeguaychú in Argentina.
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.
Cathedral of San José de Mayo
The main Catholic church of San José de Mayo, the Cathedral Basilica of St. Joseph has been the diocesan seat since 1955, a minor basilica since 1957 and Uruguay's national shrine of Saint Joseph.
More drives to Veinticinco de Agosto
- Colonia del Sacramento to Veinticinco de Agosto
- Carmelo to Veinticinco de Agosto
- Paysandú to Veinticinco de Agosto
- Tacuarembó to Veinticinco de Agosto
- Salto to Veinticinco de Agosto
- Rivera to Veinticinco de Agosto
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
Frequently asked questions
How long is the drive from Chascomús to Veinticinco de Agosto, Uruguay?
About 8 h 20 min of driving without stops, over 404 miles.
What is the driving distance from Chascomús to Veinticinco de Agosto, Uruguay?
About 404 miles (650 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 Veinticinco de Agosto 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.)
What does the U.S. travel advisory say about the Chascomús to Veinticinco de Agosto 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 Chascomús to Veinticinco de Agosto 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 Veinticinco de Agosto?
Closest to the road: Santo Domingo Convent (convent, mile 77, 0.3 mi from the route); Errázuriz Palace (art museum, mile 81, 0.7 mi from the route); Cathedral of Mercedes (cathedral, mile 262, 0.7 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.