The research assessed and evaluated the impact of the extension programs and activities rendered by the University of Baguio in Alejo M. Pacalso Memorial National High School for the past four years in order to develop a systematic plan of action for the improvement of UB’s extension programs with its Adopted community. The study employed a mixed-method approach using a sequential explanatory design. The study utilized questionnaires that were administered to the teachers, staff, and students who have benefited from the activities conducted by the University of Baguio from 2019 to the present. Moreover, an interview was conducted with the Extension and Community Outreach Coordinators to validate the results gathered from the questionnaire survey. The findings in the study highlighted the significance of the implemented services in AMPMNHS, as evidenced by the high levels of satisfaction rating of the teachers and the learners and their perceived importance of the programs. Thus, the researchers made a recommendation that the program implementers should have a periodic evaluation to assess the effectiveness of every program being implemented. Further, the University of Baguio should provide continuous training and capacity-building opportunities for teachers and staff to equip them with the necessary skills and knowledge to execute the services and handle unforeseen challenges effectively.