evidence: Description. It involves climbing part way up the SE ridge, then traversing west, across the ice-field on top of the south face, to join the Ragni Route somewhere above the Elmo, to then continue along that route to the summit. Lied and Saeland had hope to do a bolt-free ascent, but discouraged by a rime mushroom on the 12th pitch they climbed the first bolt ladder of the Compressor Route, heading straight up to the ridge after reaching the obvious chimney. In 2013 Haley and Kellogg completed an ascent without using any Compressor Route bolts for progression, climbing up the Filo Sureste route to then traverse west to join the Ragni Route. [...] CLIMBING AREAS Chaltén Massif Cerro San Lorenzo Cerro Murallón Cerro Riso Patron Cerro Catedral/Frey Tetons (USA)