Many of the well-known climbing areas are located along the Ésera River. The amazing rock formations were created by erosion of this river or its distributary channels.
The areas of Foradada del Toscar, Olvena, Congosto de Ventamillo and Sacs are popular due to their phenomenal walls and accessibility. But also the lesser-known walls in, for example, Sahún-Eriste, Ampriu, Zurita and Baldellou offer many possibilities.
You can climb sportive, classic and multi-pitch lines here.