It's legal to ski in a national forest. My resort leases the land from the National Forest service. You are fucking confusing me, the title says "Illegal Places to Ski." The you ask where we can ski without getting harassed by the cops. They will get you for being on university property, they can't stop you from skiing wherever you want in a national forest, or anywhere in the mountains, unless it's private property. As far as a national park goes, I think you can ski wherever you want in a national park too. In Yosemite there is a real small ski area called Badger Pass. State forest is the same as a national forest. As long as you are not camping illegally, littering, messing up the natural environment, they can only recommend not skiing in a certain area, otherwise you can do whatever the fuck you want. My friends and I always chill on top of a big ass rock next to the highway and the sheriff can't tell us to get down, he can only tell us to be careful and not throw shit on the highway or at cars.
Sorry I repeated so much shit. I'm kind of tired, haha.