She became the world's first high school woman to break the 11-second barrier clocking 10.98 in the 100 meters sprint at the 2015 Brooks PR Invitational on 21 June 2015 in Shoreline, Washington, United States.

Out of season marks like this are recognized by Track and Field News which has not yet published it as the National High School Record.

[4] Four days later she was named the Gatorade National Girls' Track and Field Athlete of the Year.

On December 17, 2015, Candace Hill turned professional with ASICS ten-year contract, skipping college athletics.

[11][12] A week later, Candace Hill placed 14th in 23.05 in 200 meters at 2016 United States Olympic Trials (track and field) (22.93 in prelim).