Dreta

The Dreta () is a river in Styria, northeastern Slovenia. The river is long. Its source is near the Črnivec Pass in the Kamnik Alps. It flows through the town of Gornji Grad, Bočna, and Šmartno ob Dreti, and merges with the Savinja River in Nazarje. The Dreta Valley () is named after the river.
Name.
The Dreta was attested in written sources in 1243 as "super fluvio Driete" (and as "pey der Driet" in 1340, "Driete" in 1430, and "Trijet" in 1524). The origin of the name is uncertain, but is likely connected with the Croatian hydronym "Dretulja" and the Slovak hydronym and place name "Drietoma". It may be derived from the Indo-European root "*dre-" 'to flow'.