Spain, Castilla y Leon, Spain
A ribbon of tarmac threading beech forests beneath the jagged western Picos de Europa.
Length
30 km
In miles
18.6 mi
Driving time
45 min
Atlas rating
9.1 / 10
The run
Posada de Valdeon to Boca de Huergano, following the CL-625. Drive it in either direction, though the views usually favour the climb.
Season
Snow possible November to April at the summit
Checked by the Drivers Atlas desk
Scored and written by the Drivers Atlas editorial desk, drawing on driven routes across the UK and Europe, mapping data and member road reports. Every road in the library carries a driving and scenery score set by the same method. How we score roads.
Last reviewed 10 April 2026
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