Colorado Interactive Trout Stream Map
Colorado Is loaded with beautiful trout streams and rivers. If you Find yourself there, you should be able to find some trout! There are plenty of legendary trout fishing areas here. Colorado also happens to be home to some of the most rare trout subspecies in the US. The greenback cutthroat trout, the Colorado river cutthroat and the headwaters of the Rio Grande river in CO also holds the cutthroat subspecies Rio Grand Cutthroat, You can read more about them here. Since you are most likely interested in fishing for the brown trout, you will be able to find rivers below.
Although Colorado has suffered a significant amount of urban sprawl, there are still plenty of national forests where you can wet your whistle on some great trout streams. Below I have included some of the most popular rivers where you should find great success in hooking some nice trout.
Colorado Water Level Data Here from USGS