The league was formed circa 1923[1] and currently consists of twelve public high schools in the southern part of Worcester County, Massachusetts.
[12] Charlton (which became Shepherd Hill Regional not long after),[13] Leicester, Westborough, and West Boylston had now joined, proving to be great fits due to their size and location.
[11] In 1967, longtime member Warren left to join the newly formed Quaboag League,[14] and Charlton followed a year later.
Thus began the beginning of the end for the Border Conference, now that charter member Auburn was returning to the SWCL for the 1993 season.
[19] In 1997, the rest of the conference was absorbed by the SWCL, giving them schools Bartlett, Shepherd Hill, Southbridge, Tantasqua, and Quaboag.