Character formation remains one of the primary goals of basic education as schools strive to develop learners who are not only academically competent but also morally responsible and socially engaged. Co-curricular activities provide authentic learning experiences that complement classroom instruction by fostering leadership, responsibility, discipline, collaboration, and civic engagement. This study aimed to examine how co-curricular activities contribute to students' character formation through the analysis of official school documents. A qualitative research design employing document analysis was utilized. Documentary sources included annual activity plans, accomplishment reports, project proposals, participation records, and related documents from various academic departments of San Pedro Relocation Center National High School. Data were analyzed using content and thematic analysis to identify recurring character values embedded in school activities. The findings revealed that co-curricular programs consistently promoted values such as leadership, responsibility, discipline, resilience, creativity, teamwork, self-awareness, lifelong learning, and community engagement. These values were intentionally integrated into school programs designed to support holistic learner development. The study concludes that co-curricular activities are valuable instruments for strengthening character education by providing meaningful opportunities for experiential learning beyond the classroom. Schools are encouraged to sustain and enhance co-curricular programs as integral components of learner development and values formation.