Fishing the Rio Grande: the rules change by stretch

The Rio Grande is the river that gives the valley its shape, and it is also one of southern Colorado’s better-known trout streams. For an angler near Alamosa, the river is close and inviting. The catch is that there is no single “Rio Grande fishing rule.” The rules change as you move along it.

Colorado Parks and Wildlife manages the river in segments, and each segment can have its own bag limit, size limit, and gear rule. Some upstream stretches are designated as higher-quality water and carry special regulations: artificial flies and lures only, a small keep limit on brown trout, and all rainbow trout returned to the water right away. Other reaches are managed differently. Standing on the bank, you cannot tell which rule applies just by looking; you have to know your spot.

This matters because the penalty for guessing wrong falls on you. Before you fish, look up the specific stretch you plan to be on, note whether it is fly-and-lure only, and check the current limits. Access points vary too, from State Wildlife Area frontage to public easements, each with its own rules.

For the segment-by-segment regulations, current Quality Waters or Gold Medal designations, and access points on the Rio Grande, check Colorado Parks and Wildlife, the agency that sets fishing rules in Colorado.