How to archive an event from the organiser manager
In your organizer account, in the list of events, click the three dots to open a menu and click the 'Archive' button to archive the event.
Please note that if you archive an event all results and statistics from user profiles are removed. ONLY use this option if you really want to hide the event and all its results from the public.
To view (and if you want to restore) any and all archived events, just click the See archived button: