The Utah-Idaho League operated for a total of four years:1926 through 1928 as a Class C. In 1900 the league was unclassified. 1924-1925 and 1935 it operated as an independent.
1900 Pocatello ID, Ogden UT, Salt Lake City-Rio Grandes and Salt Lake-Short Lines
1924 Brigham City UT, Malad UT, Ogden UT, Tremonton UT
1925 Bear River Canyon UT and Lewiston UT entered the league.
1933 Crystal Springs UT , Logan Collegians UT, Logan Elks UT, Malad UT, Smithfield UT, Tremonton UT
1934 Birghma City UT, Crystal Springs UT, Logan Collegians UT, Logan Elks UT, Malad UT, Ogden UT, Smithfield UT, Tremonton UT
1935 Brigham City UT, Garland UT, Logan Collegiate UT, Logan Elks UT, Prescott ID, Ogden UT, Smithfield UT, Tremonton UT
1938 Garland-Tremonton UT, Honeyville UT, Logan UT, Malda UT, Oden (Probably but not sure Ogden), Preston ID, Richmond UT
Boise, ID: 1928
Idaho Falls, ID: 1926-28
Logan, UT: 1926-27
Ogden, UT: 1926-28
Pocatello, ID: 1926-28
Salt Lake City, ID: 1926-28
Twin Falls, ID: 1926-28