 Region 18 itself was formed in 1968, as Idaho, Montana, Oregon, and Washington were split off from Arizona, California, Nevada, and Utah, which remained in the NJCAA's Region 1.When almost all of the Oregon and Washington schools left the NJCAA to form the Northwest Athletic Association of Community Colleges (now NWAC) in 1983, the next year Nevada, Utah, and far western Colorado were added to Region 18 to keep the region feasible.This year brought the initial round-robin schedule, but the next year the addition of Flathead Community College of Montana caused that schedule to be dropped.