can i bring in unopenened bottles of water?

Up to 32oz. I did the last concert I went to. They checked them and allowed me to bring them in.

Yes.

Yes, you can.

The show i went to on 8/18/18 allowed sealed water bottles, or empty water bottles to be filled inside the venue. Glass is a big no no anywhere at Red Rocks. Hope you have fun.

During a concert or during the day? Most concert venues don't allow unopened bottles of water because it's easy to fill them with other liquids and reseal. During the day they don't really check much.

Sure if you're just walking around no problem