Mount St. Ursula (Slovene: Uršlja gora) or Plešivec (1,699 metres or 5,574 feet) is the easternmost peak of the Karawanks.

It lies between the towns of Slovenj Gradec and Črna na Koroškem.

There are three villages on the slopes of the mountain: Uršlja Gora, Podgora, and Zgornji Razbor.

Below the peak of Mount St. Ursula stands the Gothic St. Ursula's Church (which gives the mountain its name and is the highest-standing church in Slovenia), a TV mast tower, a mountain lodge (the Mount St. Ursula Lodge, Dom na Uršlji gori), 1,670 m or 5,480 ft), and a monument to the soldiers fallen in World War I.

Mount St. Ursula (Uršlja gora) has a subarctic climate (Köppen Dfc).