[5] The modern name of the mountain, which came into use in the 19th century, is derived from a church [sl] dedicated to Saint Donatus.

[7] Mount Saint Donatus rises steeply from its foothills to a short, sharp ridge of varying elevation.

The ridge offers a very good view and is therefore a popular hiking destination, especially for residents of nearby Rogaška Slatina and Rogatec.

There is a beech forest reserve measuring 27.78 ha (68.6 acres) on the northern slope of Mount Saint Donatus.

[8] Of the animals, the mountain is the living place of deer, wild boar, chamois and a wide variety of birds.

Ernest Frölich, a Vienna physician working in Rogaška Slatina, laid the first marked mountain trail in Slovenia on Mount Saint Donatus in 1853.

In 1988, it was named after local cultural and sports worker Rudi Lebič (1929–1984), From Rudi Lodge, a serpentine mountain trail leads through the primeval forest area to a ridge and a peak with a 10 metres (33 ft) high cross, which was first erected in 1934, blown up in 1952 and rebuilt in 1992.

The trail continues over the ridge either towards Mount Macelj or along a few steel cables back to the mountain lodge.