Here's my list*
- Big Sky/Moonlight Basin
- Aspen Highlands/Snowmass/Aspen
- Arapahoe Basin (toss-up with Loveland)
- Vail (I know, it's not steep, and it's uncool to admit to liking Vail in a thread like this, but it can be phenomenally great skiing)
- Crested Butte
*No particular order. My list will look different tomorrow. And I do look forward to skiing Revelstoke sometime!