Uvalde High School Mariachi Extravaganza Share Date 11/15/2018 7:00 pm - 9:30 pm Location John H. Harrell Auditorium Categories Events Admission is $10 per person. Doors open at 6:30pm. Mariachi Los Soberanos will be headlining. Map Loading Map.... John H. Harrell Auditorium1 Coyote Trail - Uvalde 29.2224775 -99.78189859999998