Overview
Semana Grande turns central Bilbao into a festival city with two strong poles: the Arenal and Areatza fairground zone by the river, and the Casco Viejo streets around Plaza Nueva. The feel shifts as you move between them. Along the Nervión estuary promenade and the Arriaga Theatre frontage, people gather for big public moments, while the old town fills with comparsas energy, packed bars, family outings, parade traditions, and late-night wandering. It is not a one-stage event. You spend the week crossing back and forth between riverfront spectacle and old-town street life, with Bilbao residents very much setting the tone.