Since the 1990s reported rates of Autism Spectrum Disorders (ASD) has steadily increased. At this moment, the incidence is 1 in 54 children. At the same time, literature has reported how caring for someone with ASD presents significant challenges, for both caregivers and the individuals with ASD. Research remarks how these children with ASD living apart from their biological fathers are associated with a greater risk of adverse outcomes regardless of race, education, or mothers' remarriage. The purpose of this hermeneutic phenomenological study is to explore the lived experiences of fathers raising children with ASD in the Southwest. The research questions explored the lived experiences of fathers raising children with ASD in the Southwest, and the father involvement styles. Conceptually this study was framed within theories of interpretative hermeneutical phenomenology and family systems (Bowen, 1960). The researcher collected the data mainly through a series of three phenomenological interviews aiming to obtain rich interpretations of the participants' lived experiences, and supported by participants diaries and analytical memos, which created the basis for triangulation. The participants were four fathers who have a child diagnosed with ASD, and were living in southwestern United States, all from diverse backgrounds (e.g., educational level, ethnicity, social class). Moreover, the researcher implemented three cycles of coding for thematical analysis. Four global themes emerged from the data: a) Fathering a child with autism: an exceptional fatherhood journey, b) The Family Emotional Unit, c) Autism Awareness, and d) Concern for the future. In addition, social class and educational levels might or might not have affected these fathers' involvement styles (e.g., active, passive, and uninvolved stepfather). The findings contributed to enhance the current research in the field of father involvement with children with ASD, and how fathers could be included in the school services and their children's lives. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]