I read that in some areas of the ball park you have a decent view of the Rockie Mountains. In what section(s) would I be able to see those views?

Best view is going to be on the east side of the stadium in the higher sections, 309-329.

300 sections and east side will allow you to look west and see the mountains. I think the rooftop bar overlooks the mountains as well. But why, when instead you can look down and see Charlie Blackmon, Nolan Arenado, Carlos Gonzalez and the Colorado Rockies destroying the visiting team. You can see the mountains almost anywhere in Colorado... Just saying lol