The Tri-County Athletic Association (TCAA) is a high school athletic conference in California affiliated with the CIF Southern Section. Established in 2006, the association is an amalgamation of the Tri-Valley League and the Frontier League. The TCAA uses a system of promotion and relegation to place each school's teams, by sport and gender, into either league for a two-year period based on performance. As of the 2018–19 school year, the association is composed primarily of private schools located in Santa Barbara and Ventura counties.
In 2018, five public-school members of the TCAA left to form the Citrus Coast League. Santa Clara High School, a private Catholic school, also joined that league for football only.
Member schools Bishop Diego High School (2006–present; joined Marmonte League in 2014 for football) Cate School (2014–present) Foothill Technology High School (2014–present) Grace Brethren High School (2006–present; joined Marmonte League in 2014 for football) La Reina High School (2006–present) Providence School (2018–present) Santa Clara High School (2006–present; joined Citrus Coast League in 2018 for football) St. Bonaventure High School (2006–present; joined Marmonte League in 2010 for football) Thacher School (2014–present) Villanova Preparatory School (2006–present) Laguna Blanca School (2017–present) Dunn School, Los Olivos (2019–present)
Former members Carpinteria High School (2006–2018; joined Citrus Coast League) Fillmore High School (2006–2018; joined Citrus Coast League) Malibu High School (2006–2018; joined Citrus Coast League) Nordhoff High School (2006–2018; joined Citrus Coast League) Oak Park High School (2006–2014; joined Coastal Canyon League) Oaks Christian School (2006–2014; joined Marmonte League in 2010 for football and 2014 for all other sports) Santa Paula High School (2006–2018; joined Citrus Coast League)
Sports The Tri-County Athletic Association sponsors the following sports:
Fall season Cross country Girls' volleyball Girls' tennis
Girls' golf
Winter season Basketball Soccer Girls' water polo Wrestling
Spring season Baseball Boys' golf Softball Swimming and diving Boys' tennis Track and field Boys' volleyball
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