<Tr> <Th> River mouth </Th> <Td> Adriatic Sea </Td> </Tr> <Tr> <Th> Length </Th> <Td> 80 km (50 mi) </Td> </Tr> <P> The Rubicon (Latin: Rubicō, Italian: Rubicone pronounced (rubiˈkone)) is a shallow river in northeastern Italy, just south of Ravenna . The same name was given to a river that was famously crossed by Julius Caesar in 49 BC . While it has not been proven, historians generally agree that the two rivers are indeed one and the same; this was not always the case . </P> <P> The modern - day river flows for around 80 km (50 mi) from the Apennine Mountains to the Adriatic Sea through the south of the Emilia - Romagna region, between the towns of Rimini and Cesena . The Latin word Rubicō comes from the adjective rubeus, meaning "red". The river was so named because its waters are colored red by mud deposits . </P>

Where is the rubicon river in ancient rome