When Did We Start Tricking Up Miss Texas?

I heard on the radio that the Miss Texas Pageant was going on this week in Arlington and there would be thirty-three contestants. Of course, I guy has to check it out. But what happened to good ol' names like "Miss [insert Texas city]" or "Miss [insert Texas county]"  And how does one become, for example, "Miss Trinity River"?

Can we enter a Miss Big Sandy Creek? A Miss Pasture Near Cottondale? A Miss Liberally Lean?