The Values of the Cascade Middle School League:

• To provide healthy, fun Activity through competition, good fellowship and sportsmanship among the schools in the league.
• To direct and supervise the interscholastic activities of the league.
• To provide a compatible level of competition.
• To meet the diverse needs of this age group through sport.
• To aid coaches and athletic directors in their professional development.
• To educate parents and participants about the league values and the values of athletics.

The league is comprised of 16 private schools from around the Puget Sound Area. 

• Billings Middle School                            www.billingsmiddleschool.org
• Brighton School                                     www.brightonschool.com
• Eastside Christian School                       www.eastsidechristian.net
• Eastside Preperatory School                 www.eastsideprep.org
• Evergreen School                                   www.evergreenschool.org
• Explorer West                                       www.explorerwest.org
• Heritage Christian Academy                     www.hcabothell.org
• Jewish Day School                                 www.jds.org
• Lake Washington Girls Middle School      www.lwgms.org
• North Sound Christian School                www.cpcsschools.com 
• Providence Classical Christian School     www.pccs.org
• Renton Christian School                         www.rentonchristian.org
• Seattle Country Day School                    www.seattlecountryday.org
• Seattle Girls' School                              www.seattlegirlsschool.org
• Seattle Hebrew Academy                       www.seattlehebrewacademy.org
• Vista Academy at Open Window School  www.vistaacademy.org