Alp da Stierva from Tiefencastel

Alp da Stierva from Tiefencastel is one of cycling's great tests — 13.3km of sustained climbing, gaining 1,300m from base to summit. Averaging 9.8%, the road kicks to 19.6% at its steepest — a brutal pitch that demands respect. 16 hairpins punctuate the ascent, offering brief respite in the corners before the gradient bites again. At 2,148m, the summit rises above the treeline into an exposed, often windswept landscape. Located in Grisons, Switzerland.