The steepest mile of the top cycling climbs Austria. From this page you may navigate to the top 10 steepest bicycling climbs in Austria.. Austria's steepest bike climbs we have documented are featured in the slideshow below. Scroll down to access Austria's steepest mile Top 10 Bicycle Climbs "Table". The cycling climbs covering the steepest 1 mi gradients in AU, and some of Switzerland's hardest and most scenic cycling climbs are, in order of steepness, 1. Halltal, 2. Lamersdorf to Lammersdorfer Hutte, 3. Hochwurtenspeicher, 4. Grosser Oscheniksee , 5. Idalpe from Ischgl, 6. Aschau - Kristall hutte, 7. Kitzbuheler Horn, 8. Dolomitenhütte, 9. Steinplatte, and 10. Zettersfeld.