I've been skiing for a number of years now, and Marmot Basin is where I usually go. While Marmot is more or less Edmonton's ski hill, as locals like to put it, there's a lot people who come in from the Grande Prairie area, too. Ironically, Marmot doesn't get quite as much snow as many other ski resorts further south in BC, Alberta and even in the western US, because it can be pretty dry there during the winter. They even once came close to closing the entire ski area for the rest of the season in Dec. 1994-January, 1995, because there was so little snow in spite of the colder than average winter.
Nevertheless, Marmot Basin does get more than enough snow in most years to make for some decent skiing. And best of all - you don't usually get the huge lineups at the lifts like a lot of other ski resorts further south! I've also been to Lake Louise, Sunshine Village and Powder King, which is by Hwy 97 about 2 hrs north of Prince George - very remote and just north of 55°N, but LOTS of powder there, hence the name (anybody remember Chateau Atco?
Of Edmonton's local ski hills, I've only been to Lake Eden, which is actually west of Edmonton just off the Yellowhead to the north. I remember going there once on a day ski trip with my junior high school. It was pretty crappy, because it was fricking ICY out there.
I have a pair of 165 cm skis about 11-12 years old, but still quite servicable. While those skis seem a bit short for someone like me (I'm 5' 7"), they're pretty easy for me to handle. They're surprisingly stable at high speeds, but I'm one who likes to deal more with moguls and powder. I don't snowboard, but I know some in my family who do.