Puerto de San Glorio from Potes

The N-621 rises 26.5km through wooded valleys and open mountainside, gaining 1,308m to 1,600m. Averaging 4.9%, the road kicks to 9% at its steepest — a notable steepening that demands respect. The 8 hairpin turns break up the climb, each one revealing a new perspective on the road ahead. The road reaches 1,600m — high enough to feel the altitude on tired legs. Located in Cantabria, Spain.