North Tama County joined the Iowa Star in 2003, leaving the North Iowa Cedar League.

After many years of sharing sports teams with Dows High School, and competing as CAL–Dows, Dows left the agreement and partnered with Clarion–Goldfield for the 2014–15 school year.

[6] BCLUW (Conrad) joined the Iowa Star Conference starting with the 2022-23 school year.

BCLUW formerly competed in the North Iowa Cedar League.

[7][8] On August 15, 2022, it was announced that Rockford would be joining the North Division from the Top of Iowa Conference East Division in the 2023-2024 school year.