Cerro Castillo (2,675m) is one of the iconic mountains of the Aysén Region in Northern Patagonia. Two new routes were climbed on the peak in the austral summer of 2016.

On January 22–23, Sebastian Rojas, Diego Señoret, and Claudio Vicuña climbed Psyco Calma (850m, 5.10+ 85°), which ascends the steep, dinosaur spine–like southeast ridge. The route involved alpine terrain with bad rock quality. They bivied atop the seventh pitch of their 19-pitch route.

From February 28–March 3, Manuel Medina, Pablo Miranda, and Pere Vilarasu climbed the approximately 2km-long southwest ridge, calling their route Las 3 P (5.10+). Beginning at the toe of the ridge, they followed the entirety of the skyline, with much simul-climbing and scrambling, to reach the summit.

– Pedro Binfa, Chile