Fall was 7 ft 7 in (2. 31 m) and was still growing around his senior year, making him the tallest high school basketball player in the country while he played for Jamie's House Charter and Liberty Christian Prep. Due to his height and reach, Fall was one of the most highly scouted high school basketball centers in the country.  Fall first played for Jamie's House Charter School in Houston, where his team won the state championship. Fall played with ISTI all-stars summer travel team. He played in several NCAA certified events.  Fall then attended Liberty Christian Preparatory School in Tavares, Florida. With nearly forty different schools expressing interest in him, Fall committed to the University of Central Florida in Orlando, who had officially signed him on October 28, 2014. He would play with the UCF Knights under head coach Donnie Jones.