Mortirolo from Mazzo di Valtellina via Via Orti

Mortirolo from Mazzo di Valtellina via Via Orti is one of cycling's great tests — 11.3km of sustained climbing, gaining 1,303m from base to summit. Averaging 11.6%, the road kicks to 20.2% at its steepest — a wall that demands respect. The 35 hairpin bends define this climb — each switchback a landmark, each straight a test of resolve. The road reaches 1,860m — high enough to feel the altitude on tired legs. Located in Lombardy, Italy.