The Krka, also known as Gurk in German (German pronunciation: ), and with the Latin name Corcoras, is a river located in southeastern Slovenia within the traditional region of Lower Carniola. Serving as a right tributary to the Sava, it stretches approximately 94.6 km (58.8 mi), making it the second-longest river entirely situated within Slovenia, following the Savinja. The name "Krka" was first documented in 799 as Corca, also appearing as Gurke in 1025 and Gurka fluvio in 1249. Its Slovene derivation stems from the Slavic *Kъrka, which traces back to the Romance names *Corcra or *Corca, believed to have originated from Corcora. Similar names were prevalent among various rivers in ancient times, possibly originating from pre-Romance roots and linked to onomatopoeia. The Krka springs from a karst spring situated in a secluded valley beneath Krka Cave, just north of Krka village, approximately 25 km (16 mi) southeast of Ljubljana. During heavy rainfall, water forcefully cascades through the primary entrance of Krka Cave, forming a vigorous waterfall over its adjacent steps. As it flows southeastward, the Krka passes through several notable locations, including Žužemberk town, Dolenjske Toplice, Novo Mesto town, Otočec Castle, and Kostanjevica na Krki, eventually converging with the Sava at Brežice near the Croatian border. Its primary tributary is the Prečna, which continues from the Temenica River.

Krka (Sava) - Wikipedia