Puerto de San Isidro from Collanzo

The AS-253 rises 19.8km through wooded valleys and open mountainside, gaining 994m to 1,519m. The average gradient of 5% disguises ramps of 10.8% — the kind of gradient that turns plans into prayers. The 2 hairpin turns break up the climb, each one revealing a new perspective on the road ahead. The road reaches 1,519m — high enough to feel the altitude on tired legs. Located in Asturias, Spain.