If you're staying at the Delta Lodge, there are a couple of great hikes into the mountains - probably the best is the Ribbon Falls trail, which scoots right back behind the resort itself, although it might not be all that accessible in winter. There's fortress mountain for skiing (
http://www.skifortress.com/) and that sort of thing, but if this is a decent-sized conference, there will undoubtedly be a bus trip organized to take people to see Banff and Lake Louise, which is less than an hour away. That's a nice spot in late February, so don't miss it if you have a chance to go. And if you're looking for a decent place to drink and party at the Delta Lodge, go to the pub (I forget what it's called, but it's easy to find) where the staff hang out.