From Argentina

It can be made through a variety of companies that offer ferry service, passenger transportation and vehicles
The companies Buquebus, Ferryturismo and Cacciola rely on regular services which join Buenos Aires with Montevideo, Colonia Del Sacramento, and in high season also with Piriápolis

From Brasil

Take Route BR 471 untill you reach Chuy, from there continue through route 9 till the junction of route 15 in Rocha.
You drive 20 Km through route 15 and continue through route 10 till you reach La Pedrera. You can also take the route 9 from Chuy till you reach Castillos in Rocha.
Route 16 till the junction with route 19 and continue till La Pedrera.

Ver La Rubia Hostel in a bigger map