This circular walk is 17.4 kilometres long and it winds around the hillsides of the Izarraitz mountains. There are three paths to reach these heights, one starting in each town: the Azkoitia path starts at Plaza Balda, the Azpeitia path in Trintxera Park and the Zestoa path at the Gate. As well as these main starting points, the Aittola car park and rest area is a strategic point to start or finish the walk if you want to go straight to the circular part of the walk and skip the climb.
Izarraitzeko Bira (IB) is the official signposted circular route that traverses the entire mountain range, halfway up the mountainside.
- Difficulty: Medium
- Distance: 24.78 km
- Elevation gain: 1,199 m
- Elevation loss: 1,059 m