The 25 runs in the Alps with the highest average gradient, measured top to bottom with the elevation model. The steepest is alt at Aletsch Arena, averaging 59% over 405 m. Each resort's page shows the profile of every run, section by section.
Average gradient = total vertical ÷ run length (as %), for graded runs (green to black) of at least 300 m. On the hardest pitches the local gradient is steeper than the average.
alt, at Aletsch Arena, with an average gradient of 59%. Next come Hartlas Extrem (Kappl, 57%) and Lieuson (Auron, 56%).
Average gradient = total vertical ÷ run length (as %), for graded runs (green to black) of at least 300 m. On the hardest pitches the local gradient is steeper than the average. Data from OpenStreetMap via OpenSkiMap.