Ski season on Aspen Mountain generally begins in late November during Thanksgiving weekend and goes through late March - sometimes stretching into April. The crowds start flooding in Christmas week and the party continues until the end of January as the town comes alive for the Wintersköl festival and the X Games. But if you’re only there for the mountain, the slopes are deserted during the X Games though it’s still considered peak season for lodging. If you’re a powder hound, the best months to ski or ride Aspen Mountain are December, January and February. That said, March and April are Colorado’s snowiest months, so even if you arrive late in the season there are still freshies to go around – though the snow tends to be a little heavier, turning into compact powder near the tail end of the season. For a good balance of sun, snow and quiet, February is good bet!