Trakošćan Lake, Artificial reservoir in Varaždin County, Croatia.

Trakošćan Lake is an artificial lake in Hrvatsko Zagorje, where the Macelj, Ravna gora and Strahinjčica hills meet, beside the castle that once belonged to the Drašković family. It is about 1.5 km long, covers roughly 17 hectares and averages 2.5 m deep. A landscaped park with mown meadows, flowers and shrubs surrounds it.

The lake was made as a fish pond on the Drašković estate, the family that owned the nearby Trakošćan castle. It later also served as a mill and a sawmill site. The landscaped park around it belongs to the romantic park design of the 19th century.

The lake serves as a central element of the castle's romantic park, where winding paths and landscaped gardens reflect the influence of 19th-century European artistic movements on Croatian landscape design and aesthetic principles.

The lake lies beside the Trakošćan castle in Hrvatsko Zagorje, at the meeting point of Macelj, Ravna gora and Strahinjčica. Walking paths run along the water and turn the shore into a promenade. In winter the surface freezes and the ice stays for about three months.

The shallow water warms to comfortable levels during summer months and freezes over completely during winter. These seasonal shifts make the lake a place where climate changes throughout the year are felt strongly by visitors and wildlife alike.