Blue Mesa Reservoir, CO

About Blue Mesa Reservoir

Blue Mesa Reservoir is the largest body of water in Colorado, a sprawling high-country impoundment on the Gunnison River within Curecanti National Recreation Area. Sitting at roughly 7,500 feet near the town of Gunnison, it stretches for some twenty miles up its long, fjord-like arms when full, with deep cold water, rocky points, submerged channels and dramatic canyon walls. It is big, scenic water that fishes more like an inland sea than a typical mountain lake, and it draws anglers from across the West.

The reservoir is best known as one of the premier cold-water fisheries in the Rocky Mountain region. It is famous for its trophy lake trout (mackinaw) and as the state's signature kokanee salmon water, historically supplying eggs to stocking programs around Colorado. Add a healthy population of rainbow and brown trout and you have a destination that rewards both the troller chasing a personal-best mackinaw and the angler simply hoping for a cooler full of fish.

Fish Species

Blue Mesa is a cold-water, multi-species fishery. The standouts are:

• Lake trout (mackinaw) — the headline fish. Blue Mesa grows true trophies, with large fish living deep along structure. It is one of the most respected lake trout waters in the Lower 48.
• Kokanee salmon — a landlocked sockeye and the reservoir's signature open-water fish. Schools roam the main lake before staging to run up the Gunnison in fall. Excellent table fare.
• Rainbow trout — stocked and self-sustaining fish that provide accessible action from boat and shore.
• Brown trout — present throughout, with larger specimens often holding near inflows and rocky structure.

Anglers also encounter the occasional brook trout and rough fish, but the trout-and-salmon mix is what defines the lake.

Best Seasons & Times

Spring: As ice comes off (typically sometime in spring at this elevation), lake trout move shallower to feed and become more accessible, making it a prized window for big macks. Rainbows and browns are active in the upper water column and near inflows. Mornings and evenings are most productive.

Summer: Warming surface water pushes lake trout and the bulk of the fish deeper. Kokanee fishing hits its stride, with trollers running downriggers and lead-core to reach suspended schools. Early morning and late evening beat the midday sun and boat traffic. Trophy macks are caught deep along points and humps.

Fall: A classic period. Kokanee turn brilliant red and stage to run up the Gunnison arm, drawing concentrated effort, and brown trout grow aggressive ahead of spawning. Cooling water again brings lake trout up to feed. Crisp, less-crowded conditions make autumn a favorite for many regulars.

Winter: When safe ice forms, Blue Mesa becomes a noted hardwater destination, especially for lake trout and trout jigged over structure. Ice conditions vary year to year and must be verified locally before venturing out.

Techniques & Baits

Techniques here are dictated by the species and the depth they hold:

• Lake trout: Trolling large spoons, plugs and tube jigs along deep points, humps and channel edges is standard, often with downriggers or lead-core to reach holding depth. Vertical jigging tube jigs and heavy spoons tipped with sucker meat over structure is highly effective, particularly in spring and through the ice. Good sonar to locate fish and structure is a major advantage on water this large.
• Kokanee: Troll small, bright attractors (dodgers and flashers) ahead of pink or orange hoochies, small spoons or squid trailers, tipped with shoepeg corn often scented with brine. Run downriggers to follow the schools as they suspend deeper through summer.
• Rainbow and brown trout: Troll small spoons and minnow-imitating plugs in the upper water column, or fish from shore with bait such as nightcrawlers and prepared dough baits, plus spinners and small spoons cast around inflows and rocky shorelines. Browns respond well to larger streamers and stickbaits near structure in fall.

Because the lake is deep and clear, electronics, downriggers and a willingness to fish the right depth make a big difference.

Access & Launches

Blue Mesa sits within Curecanti National Recreation Area along U.S. Highway 50 west of Gunnison, so much of the shoreline and water is publicly accessible. The reservoir has multiple public boat ramps and marina facilities spread along its length and its main arms, supporting the trolling-heavy fishery that the lake is known for. Bank and wade access is available at numerous points along the highway corridor and near the inflows, and the upper arms offer quieter water for smaller craft.

Because this is federal recreation land, standard area rules and any applicable use considerations apply, and ramp availability and water levels can change seasonally. Confirm current ramp conditions, water level and any aquatic-nuisance-species inspection requirements with the managing agencies before launching, as boat inspection programs are common on Colorado waters.

Regulations & Licenses

A valid Colorado fishing license is required for all anglers of licensing age, and licenses are available from Colorado Parks and Wildlife and authorized vendors. Because Blue Mesa is managed for its trophy lake trout and signature kokanee fisheries, special regulations frequently apply — including bag and possession limits, size or length rules, and snagging seasons or gear restrictions tied to the kokanee run. These rules can differ from statewide defaults and change from year to year.

Before you fish, check the current Colorado Parks and Wildlife regulations for Blue Mesa Reservoir specifically, including any slot, size and bag limits, kokanee provisions, and rules for the Gunnison River inflow. Boats may also be subject to aquatic nuisance species inspection. Always confirm the current rules in season rather than relying on past limits.

Frequently Asked Questions

What is Blue Mesa Reservoir best known for catching?
Blue Mesa is best known for trophy lake trout (mackinaw) and as Colorado's signature kokanee salmon water. It also holds good numbers of rainbow and brown trout, making it a top multi-species cold-water destination.

When is the best time to fish Blue Mesa Reservoir?
Spring and fall are prime. After ice-off in spring, big lake trout move shallow and become accessible, while fall brings the kokanee run up the Gunnison arm and aggressive pre-spawn browns. Summer is excellent for trolling kokanee deep, and winter ice fishing can be strong when safe ice forms. Early morning and evening are typically the best times of day.

How do you catch lake trout at Blue Mesa?
Target deep points, humps and channel edges with trolled spoons, plugs and tube jigs using downriggers or lead-core line, or vertically jig heavy tube jigs and spoons over structure, often tipped with sucker meat. Good sonar to locate fish on a lake this large is a big advantage, and spring and ice-fishing seasons are top windows for trophy fish.

Do I need a license and are there special regulations at Blue Mesa?
Yes. A valid Colorado fishing license is required, and Blue Mesa often carries special regulations for its lake trout and kokanee fisheries, including bag, size and gear rules and kokanee snagging provisions. These vary and change, so check current Colorado Parks and Wildlife regulations and any boat inspection requirements before your trip.