each year i ski a bit less than the previous year, but its still pretty good.
freshman year i was doing 13 credits a quarter, usually 2-3 days per week, so i skied about 3-4 days in a typical school week, bagging in maybe 80 days? Down from the 120+ from senior year in high school.
last year was considerably tougher. a couple of my classes were crucial, so i had to bust my ass off, and gas got expensive, but i still probably got 60 days in?
This year, who knows. I might be taking a grad class or two during winter quarter, and arch studio consumes my life, but I always do better in the winter, so I'm not sure. Breaks, weekends, and the potential weekday off may add up to 50-60 days? Maybe more, maybe less.
And I live 1 and a half hours each way from the mountain, so its a chore to get up there many times.
So you can definitely ski while in college, although, depending on the major, distance to the mountain, etc, that may get very tough. If you don't fall in to the partying/apathetic vacuum, you'll be alright.