Can I come up to mountain high to just spend a day in the snow with my child to build snowman, play with snow, etc.?

Mountain High is a ski resort. It does not have snow play areas on the premises

Yes

Use their web page to check on snow report. If there are snow falls usually you can drive up along the way to a safe area and play. At the resort so far it's only artificial snow for ski/snowboarding only. All of the other areas for tubings has been closed.

Not a lot of room to play around, but there are camp grounds around that you can try. It didnt snow at all so far this year (as of Jan1), they were running the resort on artificial snow.

You can go up and play they do have some areas for just that. Not sure were they have it this year but i am sure they will let u know.

It should start snowing tomorrow and if it does ive seen people pull over to the side and play in it...but ive also seen people play a little bit in the resort at the edges close to the bar and stage area...however it definatley can be dangerous as it is a high traffic area catering exclusively to ski and snowboarders and many are new or learning and tend to run into people...as far as sleding they definatley will not allow that...that would be like taking a sack lunch to red lobster and only enjoying their water and free breadsticks ...lol...

Truthfully, because there is only man made snow and there is no free play area I wouldn't suggest it.

No, you can't.