We call the Stelvio, at 2,758 metres, \u2018the roof of Italy\u2019. And the Galibier? That, at 2,642 metres, is the highlight of many a Tour edition. But put those figures next to what asphalt there is in South America and Hawaii. Recently, in Colombia, there has been tight asphalt up to above 4,100 metres. That is new.<\/p>\n\n\n\n
The Alto del Sif\u00f3n<\/strong> climbs from the valley of the Magdalena River, at an altitude of about 350 metres, all the way to 4,149 metres on the flanks of the Nevado del Ruiz volcano. That's over 100 kilometres uphill. Not a typical Alpine climb of an hour and a half, but eight to 10 hours of non-stop pedalling. Incidentally, this climb is a stone's throw (big throw, small stone) from the more famous Alto de Letras, another monster in our top 10.<\/p>\n\n\n\n