Known as the 'Beast in the East', Killington is the largest ski resort in the Eastern USA and is famous for its long runs and uncrowded slopes. Boasting a remarkably long ski season (typically from mid-December to the end of May), so it's perhaps no surprise that the resort has fantastic snowmaking capabilities. Having said that, Killington also averages an impressive 6m of natural snow every winter. The infrastructure here's excellent too - Killington is home to North America's largest single-mountain lift system in terms of the number of lifts. So your group can crack on with skiing, rather than wasting time in long lift queues.