There is skiing and there is racing. Two different things.
Winter Park is not just around the corner from Boulder. On a perfect, no snow, no traffic day it is at least 2 hours. Those no traffic days are few and far between, and it can often take 4 hours to get home on a Saturday or Sunday but the average is at least 3 hours each way. Getting there involves going over a pass, so makes Copper Mtn about the same distance. Also, Loveland is much closer, as is A Basin. I’d also check the terms on the $319 pass - often have to be purchased the year before and the prices keep going up the closer you get to the start of the season.
At CU, the ski team trains at Eldora, a much smaller hill. They are racing, not looking for great terrain. When I went to CU, I skied one or two Saturdays per month. I did mostly go to Winter Park because back in the day it was still managed by the City of Denver and tickets were cheap - $13 but if you carpooled with 4 in the car, you each got $1 off. Those days are long gone. Part of your 3+ hours to get to the hill will be spent shuttling in from the outlying parking and $13 might get you a cookie and a coke at the hill but certainly not lunch. Get there early and you can save about 20 minutes by parking at Mary Jane.
No one at CU engineering or School of Mines is spending every weekend skiing. It costs too much and takes too much time. My nephew at CU has a family home in Silverthorne and his girlfriend has one in Vail but he has no time to ski every weekend. I’d be surprised if he skis 10 days per year.
If you want to ski, ski. If you want to go to college, go to college.