Sorry to say it but Denver is still a car oriented city. It tends to do a better job at tolerating cycling and encouraging it somewhat.
Even though the city government does a decent job many of the residents do not share that view.

I am not saying denver is bad for cycling but it sure is not a cycling utopia. Portland seems to do a better job but still has issues with anti cycling residents from what I hear.

I wonder if one could call Boulder a cycling haven?