In Montana, Bozeman has won State AA (the largest schools) Boys for 12 straight years now (this year went to the 6th runner as a tiebreaker). Bozeman girls won 11 straight to 2017, 2nd in 2018, and won again in 2019. They've changed coaches during that streak, and just keep winning.
I know they have huge numbers of runners out for XC; don't know much about their coaching style.