Mt. Hood Meadows announced it will run a pair of lifts this holiday weekend.   Meadows plans on operating the Easy Rider and Buttercup chairlifts, as well as the Ballroom Carpet from 9 a.m. to 4 p.m. from Friday through Sunday, offering a limited amount of terrain.   A special preview rail park is under construction for freestylers.   Additionally, Meadows will offer cross country skiing at its Nordic Center all three days and open a snowshoe trail as well.