The oldest rivalries in Texas high school football include Groesbeck vs Mexia, Denison vs Sherman, Marshall vs Tyler, Ennis vs Waxahachie, and El Campo vs Wharton.
PNG-Nederland had already been chosen a while back as the BEST rivalry.
The best is always going to be subjective. But for a fan who can leave their ego and prejudices at home, and just wants to attend an exciting game with all the makings of historic, competitive football with some good atmosphere and pageantry, MCM has been recognized as the best.