In the 2013 Illinois High School Association aka IHSA Outdoor Track and Field Championships; Helen Schlachtenhaufen placed 11th in the 1600 meters in 5:07.59.
As a senior in 2012, Helen Schlachtenhaufen placed 61st in IHSA Class AAA State XC Championship in 17:46.0.[10]
As a junior at the 2012 IHSA Outdoor Track and Field Championships; Helen Schlachtenhaufen, Caroline Marwede, Lisa Bennatan, Erin Malles placed 7th in the 4x800 meters in 9:39.50.
Schlachtenhaufen held the Lake Forest High School (Illinois) 800 m school record from 2013 to 2017 with her time of 2:18.33 and 1600 m school record of 5:03.63 from 2013 to 2017 when Emma Milburn reset both records.[11]