Outdoors and wildfire - San Luis Valley
The Rio Grande cutthroat, the valley's native trout
The Rio Grande cutthroat trout is the San Luis Valley's own native trout, and a decades-long recovery effort has kept this homegrown fish swimming in the high streams it has always called home.
Published June 10, 2026 - Last verified June 10, 2026
Most of the trout an angler catches in Colorado were brought here from somewhere else. The Rio Grande cutthroat trout is different: it is a native fish, the trout that belongs to the high streams feeding the Rio Grande and the San Luis Valley. For someone settling near Alamosa, it is a point of local pride that the valley has its own homegrown trout.
This is also a good-news conservation story. The fish today lives in only a small fraction of the habitat it once filled, pushed back over the years by competition from introduced trout, by disease, and by lost stream habitat. But steady, decades-long recovery work has kept it off the endangered species list, Colorado Parks and Wildlife reports. That work includes stocking fish raised in state hatcheries and protecting the cold, clear, higher-elevation streams where pure populations still thrive, separate from other species.
You can be part of keeping that going. If you fish high-country water in this region, check the rules for that specific stream, since some waters protect native cutthroat with catch-and-release or special gear limits. Cleaning your gear and not moving fish or water between streams is an easy way to help keep disease and invasive species out.
For where these fish live, the current rules, and the full recovery story, check the Colorado Parks and Wildlife species page for the Rio Grande cutthroat trout.