[1] Original conference members were located in three counties of southwestern Wisconsin's Driftless Area (Grant, Iowa and Richland).
[3] Boscobel left the conference in 1934 and competed as an independent prior to joining the Southwest Wisconsin Athletic League in 1935.
[6] An eighth school (Cazenovia) was added in 1938 to bring the league to its high water mark of eight members.
[7] After the Wisconsin River League became an eight-member circuit, the closing and consolidation of rural high schools began to eat away at conference membership.
[8] North Freedom joined the conference as their replacement,[9] and their membership ran for three years[10] before their district was folded and split between Baraboo and Reedsburg.