Climbing "Diagonal" (grade 4-) on Hausstein is a classic and enjoyable experience. The route, as its name suggests, ascends the rock face on a distinctive diagonal line, offering varied terrain and satisfying holds. While the difficulty isn't extreme, the route still demands attention to footwork and confident movement. Expect exposed sections that add to the thrill, and be sure to appreciate the panoramic views from the Hausstein summit upon completion. The climb is generally well-protected, but placing your own gear in certain sections is possible and may be desirable for added security, especially for less experienced climbers. Overall, "Diagonal" is a great choice for intermediate climbers seeking a memorable and rewarding alpine experience.