Flaming Gorge Reservoir, UT

About Flaming Gorge Reservoir

Flaming Gorge Reservoir is a sprawling, deep-water impoundment of the Green River straddling the Utah-Wyoming border on the flank of the Uinta Mountains. Stretching roughly 90 miles when full and plunging to depths well over 400 feet in the canyon sections, it is one of the most celebrated cold-water trophy fisheries in the West. The reservoir's dramatic red-rock canyons, clear water, and big open basins give it a character unlike almost any other reservoir in the Intermountain region, and it draws anglers from across the country.

What truly makes Flaming Gorge famous is its lake trout (mackinaw) fishery. The reservoir has produced enormous lakers, including fish well into the 40-plus-pound class, and it holds a reputation as one of the best places in the lower 48 to tangle with a genuine trophy mackinaw. Beyond the lake trout, it is equally known for hard-fighting kokanee salmon, healthy rainbow and brown trout, and a strong smallmouth bass population in the rocky shoreline zones. Few waters offer this much variety for both trophy hunters and anglers who simply want a cooler full of fish.

Fish Species

Flaming Gorge supports an unusually diverse cold- and cool-water fishery for a high-desert reservoir. The headline species are:

• Lake trout (mackinaw) — the marquee fish. Smaller "pups" are abundant and excellent eating, while the deep canyon zones hold true trophies. This is the species the reservoir is most famous for.
• Kokanee salmon — landlocked sockeye that school in open water; prized for both their fight and their superb table quality. They turn brilliant red and stage near tributaries in fall.
• Rainbow trout — stocked and stream-recruited, common throughout the upper reservoir and a reliable target year-round.
• Brown trout — present in good numbers, including some heavy fish, often relating to rocky structure and inflows.
• Smallmouth bass — thriving along rocky points, shelves, and submerged structure; a fun warm-season target.

Other species anglers may encounter include burbot (an invasive that managers encourage harvesting), Utah chub, and occasional catches near the inflows. The lake trout, kokanee, and smallmouth are the standouts that define a Flaming Gorge trip.

Best Seasons & Times

Spring: As ice leaves and water warms, lake trout move shallower to feed and become reachable by casting and trolling along points and drop-offs. Rainbows are active in the upper reservoir, and smallmouth begin staging on rocky structure as water temperatures climb toward the 50s. This is one of the better windows to intercept a big laker in relatively shallow water.

Summer: Fish stratify with the thermocline. Lake trout and kokanee pull deep, and downriggers or lead-core lines become the productive way to reach them. Smallmouth fishing peaks in the rocky shallows, and early mornings and evenings are far more productive than the midday sun on this clear, exposed water. Kokanee schools are strong and consistent through the summer.

Fall: A prime season. Kokanee stage and color up near tributaries before spawning, lake trout feed aggressively to put on weight, and browns get territorial around inflows and rock. Cooling water pulls fish shallower again, making this a top time to chase trophy mackinaw on jigs and casts.

Winter: Portions of the reservoir, especially the northern Wyoming arms and bays, can develop safe ice in cold years, drawing ice anglers for lake trout, rainbows, and burbot. Burbot in particular bite well after dark in winter. Always confirm ice safety locally before heading out.

Across all seasons, low-light periods — the first and last hours of daylight — consistently produce the best action, particularly for trout and bass.

Techniques & Baits

Techniques on Flaming Gorge vary by target species and depth:

• Lake trout: Vertical jigging is the classic trophy approach — heavy tube jigs, white or chartreuse soft plastics, and spoons worked along deep humps, ledges, and the canyon walls. Tipping jigs with a strip of sucker meat or chub adds scent. Trolling large plugs and flashers/dodger setups behind downriggers covers water and locates roaming fish. Electronics are a huge advantage for finding lakers holding tight to structure.
• Kokanee: Troll small dodgers or flashers ahead of pink/orange hoochies, micro spoons, or tipped wedding-ring rigs, run slow at the depth where schools mark on sonar. Tipping with shoepeg corn (where legal as bait) is a long-standing producer.
• Rainbow and brown trout: Troll spoons and crankbaits or cast/still-fish in the upper reservoir. Bait such as nightcrawlers or PowerBait works for stocked rainbows; browns often respond to streamers and minnow-imitating lures near rock and inflows.
• Smallmouth bass: Work rocky points and shelves with tube jigs, drop-shot rigs, small swimbaits, crankbaits, and grubs. Natural craw and shad colors are dependable on this clear water.
• Burbot: Jig with glow lures tipped with cut bait after dark, especially through the ice in winter — and keep what you catch, as managers want them removed.

Because the water is clear, lighter, more natural presentations and fluorocarbon leaders often improve strikes, especially during bright, calm conditions.

Access & Launches

Flaming Gorge is a large reservoir with public access on both the Utah and Wyoming sides, much of it within the surrounding national recreation area. There are multiple developed boat ramps, marinas offering boat rentals, fuel, and supplies, and numerous shoreline and bank-access points scattered along the canyon and the broader northern basins. The southern Utah end is defined by deep, steep red-rock canyons, while the northern Wyoming arms open into broader, more gradual bays.

Boaters should plan for big-water conditions: winds can build quickly across the open basins, and the reservoir's size means long runs between areas. Shore anglers can find productive water near inflows, points, and developed access areas. Because this is a popular destination, marinas and ramps can be busy on summer weekends. Confirm current ramp status and water levels before your trip, as fluctuating reservoir levels can affect which ramps are usable.

Regulations & Licenses

Flaming Gorge spans two states, which makes licensing important to get right. A valid fishing license is required, and because the reservoir lies in both Utah and Wyoming, there is a reciprocal arrangement that lets anglers fish the entire reservoir with a license from either state under specific conditions — but you must understand and follow the current rules, including any required reciprocal stamp or endorsement and where the state boundaries apply.

Size limits, slot limits, and bag limits vary by species (lake trout, kokanee, trout, smallmouth, and burbot are all managed differently) and are adjusted over time for fishery management goals. Burbot is invasive and there are typically encouragements or requirements to harvest it. Always check the current Utah Division of Wildlife Resources and Wyoming Game and Fish regulations before fishing, since limits, reciprocity terms, and special rules can change season to season.

Frequently Asked Questions

What is Flaming Gorge best known for catching?
It is most famous for trophy lake trout (mackinaw), with fish into the 40-pound class possible. It also offers excellent kokanee salmon, rainbow and brown trout, and a strong smallmouth bass fishery, making it one of the most diverse trophy waters in the West.

Do I need a Utah or Wyoming license to fish Flaming Gorge?
The reservoir lies in both states, and a reciprocal agreement generally allows anglers to fish the whole reservoir with a license from either state, often with an additional stamp or endorsement. Confirm the current reciprocity rules and any required add-ons with both Utah and Wyoming before your trip.

When is the best time to fish Flaming Gorge?
Spring and fall are prime, when lake trout move shallower and kokanee stage near tributaries. Summer is excellent with downriggers for deep fish and great smallmouth action in the rocks. Early morning and evening low-light periods are the most productive across seasons.

How do you catch trophy lake trout at Flaming Gorge?
Vertical jigging heavy tube jigs and spoons along deep humps, ledges, and canyon walls is the classic trophy method, often tipped with sucker or chub meat. Trolling large plugs with flashers behind downriggers also works. Quality electronics to find fish on deep structure are a major advantage.