Bednja
The last in this list and also the tenth longest river in Croatia is the Bednja River. The Bednja is a river in northern Croatia that flows into the Drava. It is 133 kilometers (83 miles) long and has a basin area of 966 square kilometers (373 square miles).
The Bednja River rises in the hilly forested highlands near Macelj in northern Croatia, west of Trakoan, where it also generates a 0.2 km2 (0.077 sq mi) lake at 255 meters above sea level. It flows southeast until it turns east near Bednja, then meanders south at Novi Marof before resuming its eastward course and heading northeast into Ludbreg. Then, it empties into the Drava River north of Mali Bukovec.
In antiquity, Bednja River was known as "Serapia." The name "Serapia" is thought to be derived from the Proto-Indo-European terms *ser (to flow) and *h2ep (water).
Length: 83 miles