At the age of six, Maslow began training as a singer when his parents placed him in the San Diego Children’s Choir. He attended La Jolla and Torrey Pines elementary schools, Muirlands Middle School, and San Diego School of Creative and Performing Arts. He had a small role in the San Diego Opera’s production of La bohème when he was 10 years old. He attended acting camp at the La Jolla Playhouse, got his first agent when he was 14, and performed as Marius in a production of Les Misérables. Quitting the San Diego School of Creative and Performing Arts (SDSCPA) midway through the 10th grade, Maslow switched to Coronado School of the Arts (CoSA). He graduated from CoSA in 2007 in the musical theater department.