Puerto de Cotos from El Paular

The M-604 rises 15.1km through wooded valleys and open mountainside, gaining 689m to 1,827m. Averaging 4.6%, the road kicks to 7.4% at its steepest — a notable steepening that demands respect. This is a climb of endurance — the kind of effort measured in hours, where pacing matters more than power. The road reaches 1,827m — high enough to feel the altitude on tired legs. Located in Madrid, Spain.