Carmel Martin was inducted by Bishop Richard, who spoke of the vocation to teaching and the call to service.
The Samaritans' Dawn Walk challenge is to walk 5 kilometres at sunrise.
The school's values, reflected in life at the school, impressed the judges.
Speakers spoke about the purpose of Catholic education, their own faith formation and the need to nurture one’s faith as a leader.
Students from 12 Diocesan schools took part in the pilgrimage walk, Mass and a picnic.
30 more students will be able to access and benefit from the excellent learning opportunities St Peter’s provides.
The students raised more than £14,000 by walking Hadrian's Wall Path and the South Downs Way.
Peter Edgington and Sydney Bridges were inducted as Executive Head and Head of School in a joyful Mass celebrated by Bishop Richard.
