 Since its inception, Taylorville (following 2013-2014, returning to the Apollo Conference) has departed and Rochester (from the Sangamo Conference, starting 2010-2011), Decatur Eisenhower (from the Big Twelve Conference, starting 2014-2015) & Decatur MacArthur (from the Big Twelve Conference, starting 2014-2015) have entered.Lincoln has departed for the Apollo Conference following the 2016-2017 school year, with Normal University joining at that beginning of the 2017-2018 school year from the Corn Belt Conference.The conference is centered on high schools in the Springfield/Sangamon County (Illinois) area.