Swimmers warm up before the 100 yard butterfly event at the Illinois High School Association girls state swimming preliminaries at New Trier High School on Friday, Nov. 22, 2013 in Winnetka. (Adam Wolffbrandt/Chicago Tribune)
Libertyville High School sophomore Staci Herchenbach races in the 100 yard butterfly.
The swimmers take off from the platform during the 100 yard backstroke event.
Marion Catholic High School junior Abby Kresal prepares to jump in the water for a warm up.