Osterweiterung (literally 'Eastern Expansion') is a popular and rewarding climb in the Graz Mountains, often graded around 4+ (UIAA). It's a classic route offering a good introduction to alpine climbing at a moderate difficulty. The climb typically involves enjoyable face climbing, some exposed traverses, and occasionally a short chimney or corner. The rock is generally solid limestone, providing good friction. While the grade is relatively easy, good route finding skills and the ability to place intermediate protection are important. Depending on the specific section of the Graz Mountains where it's located, the views from the route can be stunning, overlooking the surrounding valleys and peaks. Always check current conditions and be aware of potential hazards like loose rock, changing weather, and other climbers before embarking on this climb.