An upgraded version of scenery has just been released by PC Aviator that covers the whole of Colorado. From what I can see from the screenshots this looks to be an excellent piece of scenery. If you are interested in purchasing this product it can be bought from SimMarket here. It comes at the price of EUR 44.40 but if you owned the previous version of the product then you can pick it up at an upgrade price of EUR 22.20. This scenery add on covers the whole of the state of Colorado from border to border. This scenery is created from the most recent high resolution ground images with upgraded water features and more accurate topographical data. The scenery is compatible with both FSX and P3D.