PIAA Class 6A is heavily weighted to the East.
There's 89 teams in the state.
10 are in District 12 (Philadelphia), 30 in District 1 (Philly suburbs mostly), 22 in D3 (capital, Lancaster area) and 11 in D11 (Allentown / Reading area).
That's 73 of 89 just in those 4 southeastern districts...