Mount Saint Mary, originally known as Holm, is an inselberg in the north of Ljubljana, the capital of Slovenia. The mountain is part of the city's Šmarna Gora District. It is the highest hill in the city and a popular hiking destination.The mountain, with the shape of a two-hump camel or woman's breasts, has two peaks: Mount Saint Mary to the west and Grmada to the east. In clear conditions, the mountain offers a wide view. To the north, it is possible to see Mount Triglav and Mount Stol, and in the southern directions Mount Krim, Mount Snežnik, and Trdina Peak. The nearby hills are Bare Hill, Tošč Face, Rožnik, and Rašica.
The hill is surrounded by the villages of Vikrče and Spodnje Pirniče to the west, Zavrh pod Šmarno Goro to the north, and the former villages of Šmartno pod Šmarno Goro and Tacen to the southeast.