The Evergreen Conference (EvCo), known as the Tri-Normal League from 1920 to 1938 and the Washington Intercollegiate Conference (WINCO) from 1938 to 1947, was an intercollegiate athletic conference composed of member schools located in the states of Idaho, Oregon, and Washington and, for a time, the Canadian province of British Columbia. The league existed from 1938 to 1984. Most of the conference's members subsequently joined the Columbia Football Association.