This thesis addresses the question of how equine-facilitated psychotherapy (EFP) can be a beneficial modality for adolescents with borderline personality disorder (BPD) in working through various symptoms including suicidality, self-injurious behavior, history of trauma, impulsivity, and ineffective interpersonal relationships. This topic engages a hermeneutic and heuristic methodology, in which a depth psychological lens allows for the illumination of an effective way to support adolescents with BPD in deepening their therapeutic process. Adolescents struggling with borderline personality disorder often feel great depths of pain and hopelessness. In the context of treatment goals to increase healthy, effective, and lasting relationships for adolescent clients with BPD, the relational aspect of EFP may facilitate the client’s willingness to be open in therapy. With the incorporation of skills from Marsha Linehan’s dialectical behavioral therapy, EFP can allow psychological growth and a decrease in a number of the symptoms with which these adolescents struggle.