“Tsirio to Proto” (V, 170 m.) first ascent was made in 2016 by G. Apostolou and D. Sfantos.

The route is located the north face of Mount Onia (Oneia), just few kilometers far from the city of Corinth. The route, can be described as a recreational multipitch climb for amateur climbers that want to explore their skills in traditional multipitch climbing.

This is a very atmospheric route with great views towards Saronic sea and the Corinthian gulf.