She won the bronze medal at the 2014 Summer Youth Olympics in the long jump, and she won the 2023 USA Outdoor Track and Field Championships after the drugs disqualification of original winner Tara Davis.

[4] She was the first American to medal in athletics at the 2014 Summer Youth Olympics, and to do it she set a personal best of 6.17 metres.

[4] As a senior in 2016, Foster had reconstructive surgery on her knee due an ACL tear sustained during volleyball her junior year,[6] followed by a hamstring injury that hampered her final high school season.

[7] She nonetheless was the winner of the California Interscholastic Federation state championships long jump, breaking a 45-year-old section record.

After finishing 11th at the outdoor championships, Foster improved to win the silver medal at the 2023 USA Indoor Track and Field Championships—a result that later got promoted to gold after original winner Tara Davis tested positive for cannabis.