Three Rivers, Tri-River, Tri-Valley, West Valley, Mountain Valley, Mountain View, Southwest, Northwest, Far West, PacWest, Big Sky, Sky-Em, Skyline, Greater Oregon, Old Oregon. From the Pacific Ocean to the Eastern Oregon high desert, from the Columbia River to the Southern Cascades, Oregon high schools compete in a maddening array of league and conference names across the six classifications. Almost all reflect the natural beauty of the state in which Oregon high school athletes participate.