This is why: The points that @migdriver said in post 55 because you are not just going from one house to another in your car. You are going to the hill and in the lift lines and on chairs that other people have used..these "tourists" that went to bars and parties. Also what happened to another member here, you could be Doing all the right things and still getting covid. As they say, "It's not a problem, until it's a problem".
I agree, which is why I haven't been to Tahoe since March. But I also don't think this kind of shaming is especially useful. Skiing was explicitly called out in multiple locations as an outdoors activity that's safe. If we have something specific to point to that says otherwise, that's good information, but speculating that people engaging in a "safe" activity may be spreading COVID just breeds resentment.
This might be a different story in another state, but the California government is actually trying to take COVID seriously. Second-guessing activities they're calling safe without specific information to point to doesn't seem helpful.
Along with hoping for the best, we also need to plan for the worst. Right now it is bad...and actually could get worse if the resorts do shut down. Part of that shut down could be from people traveling from different regions and when they do shut down..restarting will be all that more difficult.
My point was that the responsibility doesn't just fall on individuals. The policy @Tony pointed out is good, but frankly, I don't think it goes far enough. 28-day orders instituted every few weeks wouldn't be covered, for instance, and yet would still be a huge disruption to someone's use of their pass. Vail's judgement that one has gotten full value out of their pass after just 7 days skiing (the 7 day figure comes up in multiple locations in their policy) also seems rather optimistic on their part. Yes, these are the terms we agreed to, but again, the only other option was not to buy a pass and, realistically, to give up on even having the option to ski for the entire season.