|High School:||Thomas Jefferson HS '10|
High School Cross Country: Jaenicke qualified for the State 4A Cross Country Championships three times while in high school. Her best state performance came during her senior year, when she placed 24th. In 2009, Jaenicke led her squad as team captain and was voted most valuable athlete for cross country at Thomas Jefferson High School. She was also selected to the Washington State Cross Country Association (WSCCA) All-State Team in 2009.
High School Track: Jaenicke ran her fastest time in the 800 during her junior year, running 2:37.04. She also ran her best times in the 1600 meters (5:27.82) and the 3200 meters (11:38.68) that season. Jaenicke excelled in the classroom, graduating from Jefferson High School with a 3.5 GPA.