Ride 2.8 kilometers gaining 350 meters at 12.6% average grade.
This is one of the greatest sets of hairpins in the world
Climb summary by Ties Arts, Netherlands:
The Asturian version of Lacets de Montvernier, though Casielles averages 13% while Lacets a mere 7.5%.
The hidden climb in Asturias. 23 switchbacks up to a little village Casielles. 2.8km and 23 switchbacks which means almost per 100meter a switchback!
The surface is excellent except in the beginning and the end. Passages of 21% are hitting you multiple (3) times.