From a small parking place close to Borgo di Curenna following a dirt road I reached the Colla d'Onzo and, from there, San Calogero church. Then I climbed Monte Castellermo (or "Peso Grande") and its E summit. Coming back I also reached Prati Bacelega and Monte Cucco with a diversion. The first part of the hike is not so exciting; you can cut some hairpins of the dirt road by an old footpath, but is not easy to follow it because its waymarks are very old.