[1] The conference remained stable until Carmel withdrew in 1973 to establish themselves with other schools in then-class AAA and Noblesville followed suit in 1979.

[1] This did not stop the Sagamore, however, as North Montgomery was added in 1975, Western Boone in 1981, and Southmont in 1984.

In 2023, serious discussions took place among the Sagamore schools outside of the Indianapolis metropolitan loop about forming a new athletic conference.

In early 2024, it was announced that both Harrison and McCutcheon would join the three remaining Sagamore schools, bringing conference membership to 5.

It also represents a change in conference geography, as both Harrison and McCutcheon are located in West Lafayette, Indiana.