Also known as La Gamonal, the Alto de L’Angliru is in Asturias, Northern Spain and makes for a relatively short but incredibly steep climb.

A brilliant route for professional road bicycle training, the trail starts at 322 metres in height and gains a further 1248 kilometres over the 13.47 kilometre route.

At its steepest point, Cueña les Cabres, the gradient is 23.6% with the average gradient along the trail being 9.9%.

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