Colorado Fishing Regulations You Actually Need to Know

Everyone 16 and older needs a valid Colorado fishing license to fish any public water in the state. Residents and non-residents have different license types and prices. You can buy a license online at Colorado Parks & Wildlife or at most sporting goods stores.

A basic fishing license covers most waters. However, some high-demand areas require an additional Habitat Stamp, which funds conservation projects. As of the current season, the Habitat Stamp is required for all license holders. It's added automatically when you buy online.

Colorado designates certain river sections as Gold Medal — waters that produce the highest quality trout fishing in the state. Gold Medal waters typically have special regulations: reduced bag limits, gear restrictions, or catch-and-release only sections.

The Gold Medal waters you're most likely to fish include the South Platte at Cheesman Canyon and Deckers, the Fryingpan below Ruedi Reservoir, the Blue River below Dillon Dam, the Colorado River from Kremmling to Dotsero, and the Arkansas River from Leadville to Pueblo.

Each Gold Medal section has its own specific rules posted at access points. The most common restriction is artificial flies and lures only — no bait. If you're fly fishing, you're already compliant with this one.

Default statewide bag limit for trout is 4 fish per day. But many of the rivers on this site have reduced limits or catch-and-release only regulations. Some key distinctions:

• Catch and release — all fish must be returned to the water immediately. No exceptions.
• Artificial flies and lures only — no bait (worms, PowerBait, salmon eggs). Fly fishing is compliant by default.
• Slot limits — only fish within a certain size range may be kept. Fish outside the slot must be released.
• 2-fish limit with size restriction — common on Gold Medal waters. You can keep 2 fish, but only if they're under or over a specified length.

Several Colorado waters require barbless hooks — including Cheesman Canyon and portions of the Fryingpan. Even where not required, barbless hooks are strongly recommended for catch-and-release fishing because they cause significantly less damage to the fish and make hook removal faster.

You don't need to buy special barbless flies. Take a pair of hemostats or small pliers, grip the barb, and press it flat against the hook shank. Takes two seconds. Do it at home for your whole fly box rather than streamside where you might drop flies in the current.

Regulations on many Colorado waters require that released fish be "returned to the water immediately in a manner that is least harmful." Here's what CPW considers proper handling:

1. Wet your hands before touching the fish. Dry hands strip the slime coat that protects against infection.
2. Keep the fish in the water as much as possible. If you lift it for a photo, limit air exposure to under 10 seconds.
3. Support the belly. Never grip a trout by the jaw or gills. Cradle it with one hand under the belly and one near the tail.
4. Face the fish upstream in gentle current and let it swim away on its own. Don't toss it back.

Colorado follows the private streambed doctrine — the landowner owns the riverbed beneath the water. Unlike states like Montana where you can wade any navigable stream, in Colorado you need legal access to be on or in a river.

Legal access means: public land (BLM, National Forest, state parks), designated public access easements, or bridges and road right-of-ways where the river crosses public land. You cannot wade through private property to reach a public section, even if you entered the river legally upstream.

Regulations change annually. Specific sections get new rules, bag limits shift, and seasonal closures get updated. Always verify the current regulations for the specific water you plan to fish.

The official source is the Colorado Parks & Wildlife fishing page. The annual fishing brochure is available as a PDF download or free at any license agent. The CPW website also has an interactive regulations map where you can look up rules by specific river section.