Leslie Roberson graduated from Garfield High School in Seattle, Washington. She competed for her high school as well as swimming for Bellevue Club Swim Team for three years. She was a State finalist all four years and a member of State Champion 200 medley, 200 free, and 400 free relays.

In high school, Leslie was involved in the outdoors club and was a facilitator of Cultural Relations, a student run group promoting cultural and racial awareness. She was also editor of the newspaper. When she is not in the pool, she is playing in Lake Washington or surfing in the Pacific.