The Luda Yana (Bulgarian: Луда Яна, "Crazy Yana") is a 74 km-long river in southern Bulgaria, a northern tributary of the Maritsa River. It runs through the towns of Panagyurishte and Strelcha, as well as a number of villages, including Popintsi, where there are considerable driftage gold deposits. The river flows into the Maritsa several kilometres east of Pazardzhik, at the village of Sinitovo.
Coordinates: 42°10′N 24°23′E / 42.167°N 24.383°E