Lahinja
Lahinja, 2006
Location
Country	Slovenia
Physical characteristics
Source
• elevation	150 m (490 ft) [1]
Mouth
• location	Kupa (Kolpa)
• coordinates	45°37′43″N 15°18′04″E / 45.6287°N 15.3010°E / 45.6287; 15.3010
• elevation	130 m (430 ft) [1]
Length	34 km (21 mi) [1]
Basin size	360 km2 (140 sq mi) [1]
Basin features
Progression	Kupa→ Sava→ Danube→ Black Sea

The Lahinja is a river in White Carniola, the extreme southeastern part of Slovenia. It is 34 kilometres (21 mi) long^[1] and originates from several karst springs at the end of a steephead valley between the villages of Knežina, Belčji Vrh, and Mali Nerajec.

In its upper course the river flows towards the north in a narrow bed with a very shallow gradient, resulting in significant meandering. All of its major affluents join it from the west and all of them start from karst springs. At Dragatuš it is joined by its major tributary Podturnščica Creek, and at Črnomelj by Dobličica Creek. From the outflow of Podturnščica Creek the bed of the Lahinja is narrow and up to 20 m deep, with numerous bends. At the vicinity of one of them stands Gradac Castle. From Črnomelj to Gradac the river has no surface affluents, but below Gradac it is joined by the high-volume and faster-flowing Krupa. After its confluence with the Krupa, the Lahinja turns towards the east. It joins the Kolpa at Primostek.

The Lahinja's river basin is asymmetric because it receives the majority of its surface affluents from the right side. It is a part of the Sava Basin. The Lahinja Regional Park extends from Knežina to Pusti Gradec, along the first seven km (4.5 mi) of the Lahinja.

• Media related to Lahinja at Wikimedia Commons