This formation sort of "leans up against" the East side of La Prenyada. 16 climbs are listed in Cugat's guide,

Take the same path from the refugi St Benet as for La Prenyada, but branch right after passing El Gat's west face, and before going into the notch between Roca Barbera and La Prenyada.  It can also be reached via a path the brances left off the trail just beyond the refugio. See Map posted to the main area "Sant Benet - South of l' Elefant"