Hello,
Would it be possible for you to release photos of Budapest Pride crowd to get a good assumption about total crowd size? It is very popular in the news now, everyone guessing the attendance.
It was on June 28 between 14:00 and 20:00, the marching was between 15:00 and 17:00.
https://budapestpride.hu/hir/minden-amit-tudni-kell-a-30-budapest-pride-felvonulasrol/#terkep