Argentina–Uruguay border, International border along Uruguay River between Argentina and Uruguay
The border between Argentina and Uruguay runs for about 579 kilometers along the Uruguay River, from where it meets the Paraná River to its mouth at the Río de la Plata. Multiple bridges cross this waterway at different points, allowing movement of people and goods between the two nations.
The border was established through the Treaty of Montevideo in 1828, which recognized Uruguay as an independent nation between Argentina and Brazil. This agreement ended a territorial dispute and created the political divisions that remain today.
Border towns along the Uruguay River are connected through festivals, markets, and sporting events that strengthen ties between people on both sides. These regular gatherings allow communities to share traditions and build relationships that cross the waterline.
Crossing conditions vary by bridge and can be busy with traffic, especially at the Gualeguaychú-Fray Bentos bridge where commercial trucks are common. Plan visits to avoid peak hours and keep travel documents easily accessible.
The Salto Grande Dam spans across the border, producing hydroelectric power for both countries while managing the flow of the Uruguay River. This shared engineering project shows how the two nations work together to use natural resources.
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