Students in grades 5 - 8 have the opportunity to participate in CYO Athletics.  The program includes soccer, volleyball, basketball, bowling(new in 2011), baseball, softball and cheerleading.

See the St. Sebastian Booster Club website for more information.

Students in lower grades have the opportunity to participate in the I-league program.  The I-league program includes fall soccer, basketball (Junior Arrows), summer baseball and softball.  Older students also have the opportunity to participate and see the sport from a different perspective by being referees and umpires.

See the St. Sebastian Booster Club website for more information.

Boys in grades 1 thru 5 have the opportunity to participate in Scouting in a Christian-based atmosphere.  Pack 1152 is an active pack with 50 plus boys.  The boys enjoy many activities like camping, hiking, Pinewood Derby races and much more.

See the Pack 1152 website for more information.

Chess Club for students in grades 1 to 8 meets Mondays from 3:00pm to 4:15pm.