Oslo's major events, ranked by crowd impact
Every event here is verified by a person, dated from its own organiser, and measured against Oslo's day-by-day crowd forecast — so they can be ranked on one scale. See the city, day by day →
#1 Oslo Marathon (DNB Oslo Maraton) →
Oslo Marathon is the busiest of Oslo's 1 verified major events — its day reads Busy, busier than 65% of Oslo's year.
The 2026 Oslo Marathon in Oslo runs 12 Sep 2026, confirmed; expect Busy days — busier than 65% of Oslo's year. (Avoid-Crowds, as of 2026-08-31; recomputed nightly.)
Disclaimer — event dates can change; expected dates are labelled and can move.