Barcelona's major events, ranked by crowd impact
Every event here is verified by a person, dated from its own organiser, and measured against Barcelona's day-by-day crowd forecast — so they can be ranked on one scale. See the city, day by day →
#1 La Merce (city patron festival) →
La Merce is the busiest of Barcelona's 1 verified major events — its day reads Busy, busier than 65% of Barcelona's year.
The 2026 La Merce in Barcelona runs 24 Sep 2026, confirmed; expect Busy days — busier than 65% of Barcelona's year. (Avoid-Crowds, as of 2026-08-29; recomputed nightly.)
Disclaimer — event dates can change; expected dates are labelled and can move.