Colorado College was my first thought too!
Agreed, the block schedule is not for everyone, but it might actually be a nice option for an actor who would like the freedom to take short leaves for professional projects, without having to tank an entire semester. Each block is about three weeks, I believe.
And it certainly fits the artsy/outdoorsy + climbing/snowboarding parameters! It’s a little over an hour from Denver International, which is a pretty convenient travel hub.