Assuming I don’t carry anything (including ski poles), and stay within the techum, may I go skiing on shabbas? Also, may I go on the lift?
Not allowed.
What’s the isur? Just the electricity of the lift?
There are a myriad of issues that come with skiing including techumin, muktzeh, carrying, shavat and within each one a few different issues. Unfortunately it would require too much time to type, but suffice it to say, it would be an issue.