Burnett was a two-time state meet placer at Desert Ridge High School in Mesa, Arizona.

Burnett placed fourth in the Arizona Interscholastic Association state track and field championship high jump at 5-0 and eighth in the shot put at 35-8, both as a senior in 2007.

[5][6] On August 13, 2017, Katie Burnett shatters American record in women’s 50 km race walk in London at the World Championship.

[7][8] In 2019, she competed in the women's 50 kilometres walk at the 2019 World Athletics Championships held in Doha, Qatar.

[9] As of 2021, Burnett coaches the Mountlake Terrace High School cross country and track teams.