If you are staying in Banff, you have easy access to three very different ski areas on your SkiBig3 lift ticket. Norquay - the local mountain - is only 10 minutes from Banff. It is the smallest of the three ski areas, but is somewhat of a hidden gem. It is surprisingly large, with lots of medium length runs to enjoy and an excellent tubing hill.
Sunshine is about 15 minutes from Banff. From the base area, you have a 20-minute gondola ride up to the resort. From there, you can access a huge amount of terrain of all levels. Sunshine doesn't have much snowmaking, because they don't need it. They get so much snow that they actually "farm" it to keep the skiing conditions at a high level. Their season typically runs from early November until May.
Lake Louise is about 40 minutes from Banff and offers a huge variety of terrain. Blessed with very reliable snow and incredible scenery, Lake Louise will have you torn between wanting to race down the nearest run or stopping to take more photos. If you are looking for the perfect lunch, check out Kuma Yama in the main lodge - amazing sushi!