Crystal Lake South High School

Students toss green and yellow powder for the color toss.

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Ryan Felz holds a Coach of the Week football presented by the Chicago Bears

September 11, 2026

Ryan Felz Named Chicago Bears Girls Flag Coach of the Week

Crystal Lake South Girls Flag Football Head Coach Ryan Felz was named Girls Flag Coach of the Week by the Chicago Bears on September 8.

August 25, 2026

All Four D155 High Schools Nationally Recognized for Eighth Straight Year

For the eighth consecutive year, all four Community High School District 155 high schools have been ranked among the top 19% of public high schools in the nation by U.S. News & World Report.

July 22, 2026

Crystal Lake South Back-to-School Guide 2026-27

Back-to-School Guide Crystal Lake South High School Welcome, Gators! Welcome to the 2026–2027 school year! This guide will help you and your student start the year off right as we prepare to welcom...

July 9, 2026

Athletic Registration for School Year 26-27

Athletic Registration for the 26/27 School year is now open. Registration must be completed on the Arbiter Registration Website PRIOR to tryouts/practices. If you have not yet registered your stude...

Michelle Kidd holding Inaugural Memorial Award

May 11, 2026

Michelle Kidd Honored with Inaugural Chamber Award

Crystal Lake South teacher Michelle Kidd was honored by the Crystal Lake Chamber of Commerce with the Inaugural Robert & Rosemary Blazier Memorial Award on May 7.

Students holding award from culinary challenge

April 21, 2026

CLS Pair Places Second at MCC Culinary Challenge

Cullen Perri and Temire Onome-Ojigbo place second at McHenry County College High School Culinary Challenge, making four identical dishes in 90 minutes.