Adding bus transportation in January 2001 allowed students from south and west Bell County to attend the school.

During its first four years, Holy Trinity added many athletic and extra-curricular programs to the school, including the first drama production, first newspaper, and first yearbook in 2000.

In 2005, Holy Trinity secured a donation of a portable science building from the Cameron Independent School District and was able to move the building, creating the EBCO Science Center.

During the past several years, Holy Trinity increased academic offerings to include many advanced placement and dual credit classes.

On November 30, 2010, the students, faculty, staff, parents and volunteers moved the school to its new facility at 6608 W. Adams Avenue.