Driving from Rivera to Barra de Valizas: 378 miles, roughly 9 h 25 min without stops. Road by road, 7 places to stop and the State Department advisory.
Nueva Helvecia to Barra de Valizas: 252 miles (406 km), about 5 h 46 min of driving. The route, U.S. travel advisory for Uruguay and 9 stops on the way.