Kolumbija

Colombia is where climbing becomes a discipline of endurance rather than a single hard effort. Threaded through the Andes, its roads pitch upward for hour after hour, and of the 316 catalogued climbs here, 153 rank as hors catégorie — a density of brutal ascents matched almost nowhere else. The summits reach as high as 4134 m, dragging riders up through thin air and shifting weather into the bleak, wind-scoured páramo above the treeline. This is terrain that shaped generations of Colombian climbers.

The marquee names read like a bucket list: Alto de Pasca, Alto de Cusirí, Alto de Patio Bolos and Alto de Bellavista. But Alto de Letras stands alone. Rising roughly 70 km from Mariquita, it is one of the longest paved ascents on the planet — a single, unbroken climb that keeps going long after your legs have stopped asking why. Come for one, and the mountains will tempt you into the rest.