|Hometown:||Port Angeles, Wash.|
|High School:||Port Angeles HS|
Was a three-time first-place finisher in the Olympic League, District 3 of Washington and finished in the top six or better in the state three times as a high school athlete. Won varsity honors all four years as a Roughrider and earned the Olympic League Scholar Athlete Award from 2015-2016.
Set the school record for the II Dive meet with a personal high of 427.05. Finished seventh in the state in 2015, 1st in the state in 2016, and second in 2017.
Middlestead is the daughter of Michael and Kathrn Middlestead. Her dad, Michael, was a wrestler in college. Cassandra has two sibblings: Hannah and Christian.