Go high and trust the snowmaking, because in November the natural snowpack is thin everywhere. The Colorado high country, led by Keystone, Arapahoe Basin, Copper Mountain and Breckenridge, combines base altitudes above 9,000 feet with the most aggressive snowmaking in the country, which is why they open weeks before lower resorts. For dependable early turns, that cluster is the safest bet in America.
Set your expectations for the terrain you will actually get. Early season usually means a handful of top to bottom runs on manufactured snow rather than the open mountain, so it favours cruisers, racers and families over powder hunters. The exceptions are storm driven: a big early Pacific system can open vast terrain at Mammoth, and the first Colorado storms transform Vail's bowls overnight.
Have a backup mountain and flexible dates if early snow matters. The West Coast wildcard at Mammoth and the Eastern early bird at Killington both swing on a single storm, while the Colorado cluster is the consistent core. Compare the timing in our Switzerland early season ranking and early season in the Alps, see where the deep snow lands later in our United States powder guide, and plan from the United States destination guide.