While Colorado ski resorts continue to fine-tune plans for mountain access this winter in response to COVID-19, here is a quick rundown of what we know now. Currently the five Vail Resorts mountains (Vail, Beaver Creek, Breckenridge, Keystone and Crested Butte) will be the only resorts requiring across-the-board reservations. Arapahoe Basin and Aspen Snowmass will be requiring reservations for Ikon Pass holders but not for season passes sold by those resorts. Many resort officials are saying polices they’ve already announced could change, and Vail Resorts chief executive Rob Katz even concedes its reservations policy may be lifted during the season if conditions allow. We will keep this list updated as more information is made available. Arapahoe Basin Those who have Arapahoe Basin season passes will not have restrictions and will not be required to make reservations, but pass sales will be limited.