In January 2015, Dave Anderson, Matt Hartman, Jared Spaulding, and Szu-ting Yi traveled to the Avellano Towers. They first made an attempt on the east face of South Avellano Tower, climbing approximately 400m of the 800m wall, with difficulties up to 5.10- and 5.7 R. After this they made the first recorded ascent of the north ridge of the Tooth (100m, 5.7). Lastly, they climbed the Tooth by its southwest ridge: Filo Suroeste (305m, 5.10). Jared Spaulding has compiled a PDF with notes and photos of all known climbs, attempts, and exploration in the Avellano Towers—download it here.
Erik Rieger, with information from Matt Hartman and Jared Spaulding, USA