The Pioneer Conference was formed in 1977 with six original members: Brecksville, Brunswick, Cloverleaf, North Royalton, Strongsville and Wadsworth.
Their communities were also easily accessible from I-71, I-76 and I-271 (and their school districts grew rapidly as a result of that).
Wadsworth left in 1984 for the Suburban League and was replaced by Medina two years later.
[1] North Ridgeville replaced Cloverleaf, which left to join the Suburban League in 1997.
The eight remaining schools (listed below) continued their membership until the formation of the Northeast Ohio Conference in 2007: