For High school football, what are generally the “biggest” games in the season (by viewer attendance)?

Hey fellow Americans, American-who-payed-zero-attention-to-sports-in-school-and-now-has-to-write-about-it-for-a-blog here.

In general, what would you say the "biggest" games are in HS football? Is it the homecoming game? State championships? Or place by place, is it the games between two known "rival" schools?

Thanks in advance btw