Getaruelas managed to hang on and claimed back-to-back victories with a time of 39 minutes and one second.
Joery Ann Lee trailed in 40:37 while Merlita Arias settled third in 42:12.
In the men's division, Delposo surprised the tough field after zooming on top with a time of 32:41 clocking to win the title.
Delposo never gave way to teammate Adonis Singson, who settled for second in 33:15.
Miljune Luterte of UC was third in 34 minutes while defending champion Mendel Lopez dropped to fourth place in 34:46.