The Boyer Valley league dated to the 1960s and included as many as twelve schools at one time in its history.
With the number of members dwindling, they looked into a merger with the Maple Valley Conference.
Adair–Casey and Coon Rapids–Bayard were founding members of the new West Central Activities Conference around the same time and Adair–Casey joined the Rolling Hills in 1996.
Four of the league's members decided to explore the option of forming a new conference with other similar schools.
Charter Oak–Ute began sharing with Maple Valley–Anthon–Oto of the Western Valley Activities Conference during the 2017–18 season.