You're welcome to pool resources with like-minded individuals, purchase all property that has been developed or is planned to be developed in Colorado, and prevent it from being used by or sold to anyone else.

Until then, the entire state is not your backyard, thankfully.

And it should go without saying, but there's no natural right for things around you to remain exactly like they have always been. Although you do, of course, have a natural right to free speech to grumble about how they change.