This climb to the Puerto de Panderruedas begins in the very touristy village of Posada de Valdeón. The ride takes place in the shade of some magnificent mountain massifs of the Picos de Europa. Unfortunately, these are only sometimes visible while cycling because the road mostly runs through the forest. The climb covers a net altitude gain of 543 meters. Over the first 6 kilometers the gradient varies considerably (2-8%) and measures 4.6%, on average. The last 3 kilometers are harder (6-9%).