Luckily the ski season is about over and next season will start with everyone who wanted a vaccine (in the US) having ample opportunity to get one. In this transition period, I'm going to keep following CDC guidance for masks out of respect for those who are still in process of getting vaccinated or are unable to be vaccinated for whatever reason. If the local mandate is more restrictive, I will follow that, but generally local laws I have experienced have been more lax than what the CDC recommends.
Here's the CDC guidance in a nutshell.
So, even as vaccinated person, I read this as: any public indoor activity requires a mask. Any public outdoor crowded activity, wear a mask.
So what is skiing on that list? As a vaccinated person, I would consider skiing to still require a mask in the lift area, I guess depending on number of people in line, it may not be necessary. So maybe sometimes a crowded outdoor sporting event or a small outdoor gathering, depending on crowds... I guess it depends on where you ski. Where I ski, it's not a small outdoor gathering, so it must be a 'crowded outdoor event.' And then there are areas where they don't let you decide, but decide for you (ie mask mandate).
Roughly 50% of population that can get vaccinated has done so at this point. That still leaves a lot of people that are not yet protected or are trying to get there. So, I wear a mask for them. For me, wearing a mask in public is really easy. I will err on the side of caution because masks are really not a huge deal for me. I don't understand the intense dislike. The upside seems way bigger than the down side...currently. It's a minor inconvenience to me. Sorry, the pandemic is still here.
There will come a point where vaccination and infection rates slow to the point that I will drop the mask completely in public. Or if CDC says vaccinated can drop them entirely. As far as I can tell, they haven't made that call yet.
In my local community - weekly cases have been increasing slightly since March. We have not beaten this thing yet.