San Juan de Gaztelugatxe loop from Bilbao

This loop connects the city with the heart of Urdaibai, heading inland from downtown Bilbao before returning along the coast.

After rolling through quieter interior roads, the route reaches the Urdaibai Natural Reserve, where views begin to open up, especially on the stretch between Gernika and Bermeo that follows the river. A couple of cols add a challenge mid ride, with Jata from Bakio as the most recognizable climb.

Along the way, there are easy chances to stop for coffee, food, or pinchos.