| What | When | Key Numbers |
|---|---|---|
| Section A wade fishing | Year-round (April and Oct best) | 8,000-14,000 trout/mile (peak surveys higher); 7 miles dam to Little Hole |
| Section B float trips | March-November | Class II rapids; 8 miles Little Hole to Indian Crossing |
| Section C trophy browns | Sept-Nov for big fish | Lowest density, biggest fish; 25-30 inches possible; 12 miles to CO border |
| Ideal wading flows | Year-round below 1,200 CFS | 800-1,200 CFS comfortable wading; 1,200-2,500 CFS float-only |
| Guided float trips | Book by February for summer | $625-700/day full-day drift boat (gear, lunch included) |
| Fly shop | Trout Creek Flies | (435) 885-3355, Dutch John, UT |
The Green River below Flaming Gorge Dam is one of those rare fisheries where the numbers actually undersell the experience. Utah's Division of Wildlife Resources electrofishing surveys have documented 8,000 to 14,000 trout per mile in the upper reaches below the dam (with peak survey years recording even higher numbers), and the broader river averages 6,000 to 8,000 fish per mile. For context, most "good" trout streams in the West hold 1,000 to 3,000.
The water runs emerald-green and cold year-round (40 to 60 degrees F), pumped from the bottom of Flaming Gorge Reservoir. That consistent temperature means consistent hatches, and consistent hatches mean rising trout almost every month of the year.
It is also remote. Dutch John, Utah sits at the end of a long drive through the Uinta Mountains, 3.5 to 4 hours from Salt Lake City. That remoteness keeps crowds manageable outside of peak summer weekends.
Red-brown cliffs and ponderosa pines line the Green River below Flaming Gorge Dam, with the emerald tailwater running clear over boulders
The fishable river below the dam spans about 27 miles to the Colorado state line, broken into three distinct sections. Understanding each one is the key to planning your trip.
This is the technical water and the wade-fishing showcase. High-gradient riffles, pocket water, and boulders create thousands of feeding lanes packed with trout. Spinner Fall Guide Service, one of the original Green River permit holders since 1986, calls it the most heavily fished stretch, but for good reason: this is where those eye-popping fish-per-mile numbers come from.
A maintained trail runs the full 7 miles from the dam to Little Hole, making Section A the best wade-fishing water on the river. You can park at either end and hike to your spot. Famous holding water includes Lunch Counter, Secret Riffle, and Black Lagoon, names you will hear at every fly shop in Dutch John.
The trout here are well-educated. Expect to downsize your tippet (6X or 7X fluorocarbon) and nail your dead drifts. Orvis fishing reports consistently note that sight fishing is the norm in this crystal-clear water, with visibility often exceeding 10 feet.
Floaters share Section A with anglers. The 7-mile stretch takes 3 to 4 hours by raft or drift boat and features several Class II rapids, including Mother-in-Law Rapid (Class II+). OARS runs day trips through Section A that are family-friendly enough for kids as young as 4.
Section B transitions from canyon water into the open valley of Browns Park. The upper half fishes similarly to Section A, with fast riffles and pocketwater. As the canyon opens up, you will find long, slow pools with grassy banks that are tailor-made for dry fly fishing.
This is the section where most guided float trips run. The mix of water types means you can nymph the riffles in the morning and switch to dries on the flats in the afternoon. Fish density drops from Section A's peak numbers, but Western Rivers Flyfisher notes that the average size increases as you move downstream. Expect fewer fish per cast but better odds at a quality brown or rainbow.
One note for paddlers: Red Creek Rapid, roughly midway through Section B, is the biggest whitewater on the Green below Flaming Gorge. It rates Class III and deserves a scout from the bank if you are running your own boat. The left side is a rock garden and the right side carries the main Class III channel; choose your line based on current flow levels. The float takes 4 to 5 hours total.
Camping is available at designated sites along Section B, making overnight float-and-fish trips possible.
Section C is the trophy water. The river slows through open prairie, creating long, lazy runs where big browns patrol the banks. Fish counts are lower here than Sections A or B, but the average size jumps considerably. Browns of 25 to 30 inches are a real possibility, especially on streamer patterns.
Access is limited and the float is long, typically 5 to 6 hours. Most anglers commit a full day to Section C and hire a guide with a drift boat. The section flows through the open Browns Park area (the Browns Park National Wildlife Refuge itself begins across the Colorado state line), and the wildlife viewing along this stretch is excellent. Both designated and dispersed camping are permitted.
Flaming Gorge from the rim: red rock walls drop into emerald water, with pine-covered slopes stretching toward the Uinta Mountains
Flaming Gorge Dam controls the river, and flows can change significantly from season to season. The Bureau of Reclamation manages releases for water storage, endangered fish species downstream, and power generation.
| Flow (CFS) | What It Means |
|---|---|
| 800-1,200 | Low/winter flows. Fish concentrated, excellent wading, sight fishing at its best |
| 1,200-2,000 | Normal range. Good wading in Section A, ideal floating on B and C |
| 2,000-2,500 | High but fishable. Wading limited to shallow margins, floating productive |
| 2,500-4,000+ | Summer peak releases. Float-only, fish pushed to banks, streamers dominate |
Summer flows vary widely with dam releases, typically ranging from 800 to 2,200 CFS, with peaks above 4,000 CFS possible in June. By fall, flows often settle to 800 to 1,200 CFS. Lower flows concentrate fish and make wading easier, but they also make the trout more skittish.
Understanding where trout hold at different CFS levels is one of the biggest advantages you can have on the Green:
Before any trip, check current Utah flows on RiverReports to see real-time conditions. Flow changes of even 200 to 300 CFS can transform the fishing. Rising water tends to trigger feeding activity, while sudden drops can shut fish down for hours.
One important detail: the dam releases cold, deep water from the reservoir. Water temperature stays remarkably stable regardless of air temperature. You can fish comfortably through July heat (air temps in the 90s) because the water stays in the low 50s.
Desert bighorn sheep pick through rocky terrain near the Green River corridor, one of several wildlife species you will spot from the trail or drift boat
The Green River's consistent water temps produce reliable hatches year-round. Here is what to expect.
Midges dominate. Size 18 to 22 Griffith's Gnats and zebra midges are your go-to patterns. Flows are typically low (around 850 CFS), and you will have the river mostly to yourself. Articulated leeches and streamers can produce big browns during cold months, particularly in Section C.
Fish concentrate in deeper runs and slower water. Sight-nymphing with scuds and sowbugs is effective on sunny afternoons when fish move into the warming shallows.
The star of the show: the Blue-Winged Olive hatch, which peaks in April during overcast days. Size 18 to 20 BWO dries and RS2 emergers are essential. This is widely considered the best dry fly fishing of the year on the Green.
Flows remain stable around 1,000 to 1,200 CFS through most of spring, keeping wading conditions comfortable across Section A.
The river gets busy with hatches. Pale Morning Duns (June through August), caddis (June), and Yellow Sally stoneflies (June) all compete for attention. Cicadas show up in May and June, triggering explosive surface strikes, a phenomenon that Spinner Fall guides consider one of the river's most exciting events.
Summer also brings the most recreational traffic, with rafters sharing Section A. Early morning and late evening are your best windows for solitude.
Tricos in the morning (especially on Sections B and C), followed by afternoon BWOs. Hopper-dropper rigs work well into October. Fewer crowds, cooler air, and fish feeding aggressively before winter make fall a favorite among regulars.
Many local guides consider October the single best month to fish the Green.
Wind is a factor on the Green that trips up first-time visitors. The canyon sections (A and upper B) offer some protection, but once the river opens into Browns Park on lower B and all of C, afternoon gusts of 15 to 25 mph are common from late spring through early fall. These typically build between noon and 2pm and can persist until evening.
What this means for your fishing:
Thunderstorms roll through in July and August. They rarely affect the tailwater itself (the dam buffers weather), but lightning in the canyon is serious. Get off the water if storms approach.
Flaming Gorge Reservoir, the source of the cold, clear water that sustains the tailwater fishery below the dam
| Pattern | Sizes | When |
|---|---|---|
| BWO Parachute / Sparkle Dun | #18-22 | March-May, Sept-Nov; overcast days |
| Griffith's Gnat | #18-22 | Year-round midge clusters |
| Zebra Midge | #18-24 | Year-round, morning and afternoon hatches |
| RS2 | #20-24 | Year-round emerger; works as nymph or dry |
| PMD Dun | #16-18 | June-August |
| Pale Morning Dun Emerger | #16-18 | June-August |
| Elk Hair Caddis | #14-18 | June-July |
| Yellow Sally | #14-16 | June, especially B and C sections |
| Cicada Pattern | #8-10 | May-June (when available) |
| Pat's Rubber Legs | #8-10 | Year-round as a searching pattern |
| San Juan Worm | #10-14 | High-water days, year-round |
| Woolly Bugger | #6-10 | Year-round streamer, olive and black |
Midges are the bread and butter here, just like on the San Juan River. But the Green offers more diverse hatches, so you will cycle through patterns more often than on a pure midge fishery.
Cicada years are special. When they show up in May and June, even large browns that normally ignore dry flies will crush a foam cicada pattern on the surface. Ask at the fly shops whether it is a cicada year before you go.
For Section C trophy hunting, streamer patterns are king. Local guides fish articulated patterns and sculpin imitations with slow strips and long pauses, targeting the big browns that patrol the undercut banks.
Both approaches work on the Green, but they suit different sections and goals.
Wade fishing is best on Section A, where the maintained trail provides walk-in access to 7 miles of water. You can park at the dam or at Little Hole and work upstream or downstream. The pocket water rewards precise casting and careful wading. Felt-soled boots are a must on the slippery rocks.
Float fishing is the primary method for Sections B and C. A drift boat lets you cover miles of water, stop to wade promising runs, and access stretches that are unreachable on foot. Most guide services out of Dutch John, including Trout Creek Flies and Spinner Fall Guide Service, run drift boat trips on the B and C sections.
If it is your first trip, a guided float on Section B is the smart move. You will get the full range of water types, the guide knows which runs are fishing well, and you can gauge the river's personality before committing to a DIY wading trip on Section A.
River otters thrive in this stretch of tailwater, and spotting one from your drift boat is a regular bonus on float days
Dutch John sits in the far northeast corner of Utah, at the base of the Uinta Mountains. From Salt Lake City, it is 3.5 to 4 hours via I-80 east into Wyoming, then south through Manila on Highways 414 and 44 to US-191. The nearest town with full services is Vernal, about 45 miles south on US-191. Stock up on groceries and gas there before heading into Dutch John.
The drive itself is worth the trip. US-191 cuts through the Flaming Gorge National Recreation Area, with views of red rock canyons and the reservoir that rival anything in southern Utah.
The drive to Dutch John climbs through conifer forests and mountain passes in the Uinta range before dropping into Flaming Gorge
| Location | Access | Notes |
|---|---|---|
| Flaming Gorge Dam | 1.4 miles on FR 219 from US-191 | Section A put-in |
| Little Hole | 4.8 miles west on Little Hole Road from Dutch John | Section A take-out / Section B put-in |
| Indian Crossing | 20.5 miles east on Browns Park Road from US-191 | Section B take-out / Section C put-in |
| Swallow Canyon | 25.3 miles east on Browns Park Road | Section C take-out (recommended over Swinging Bridge) |
No permits are required for private boaters from the dam to Crook Campground. Life preservers (PFDs) are required and must be worn on the water.
The neon welcome sign in Green River, Utah
Dutch John is a tiny community (population around 150) that exists almost entirely because of the dam and the fishery. It is not Jackson Hole. There are no craft cocktail bars or boutique hotels. What it has: a few lodges, cabin rentals, a general store, fly shops, and people who fish the Green every day.
Cell service warning: Dutch John has spotty coverage at best (Verizon works in spots, other carriers are hit or miss). On the river, especially Sections B and C through Browns Park, you are effectively off-grid. Download your maps, check flows, and make your phone calls before you launch. Tell someone your float plan and expected return time if you are heading to Section C.
Lodging options:
Several permitted guide operations run trips on the Green. A full-day drift boat float runs $625 to $700 depending on the outfitter, and typically includes the boat, all gear, flies, tippet, leader, lunch, and beverages.
Book early. Summer and fall calendars fill by February or March for the popular guide services.
The Green River below Flaming Gorge Dam is artificial flies and lures only water. The current slot limit from the Colorado state line upstream to the dam:
This slot limit protects the breeding-age fish that sustain the population. Verify current rules with the Utah Division of Wildlife Resources before your trip, as regulations are reviewed annually.
Licensing: A 3-day Utah non-resident fishing license is $44 as of July 2025 (increased from $31). A 7-day option runs $91. Buy online through Utah DWR and verify current pricing before your trip, as fees have changed recently. Daily parking passes at recreation areas run $5.
Spawning note: Rainbow trout spawn through spring. Watch for redds (lighter-colored gravel patches) and do not wade through them. Do not anchor boats over spawning areas.
The Green is not just a fishing river. It is one of Utah's best introductory whitewater runs.
Section A features roughly one Class II rapid per mile, with names like Roller Coaster, Mother-in-Law, and Can of Worms. The 7-mile float takes 3 to 4 hours and is suitable for families with basic paddling skills. Several outfitters in Dutch John rent rafts, inflatable kayaks, and dories.
Section B is mellower except for Red Creek Rapid (Class III), a short but consequential drop. Scout it from the bank and pick your line based on current flows. The 8-mile float takes 4 to 5 hours and passes through the most scenic transition on the river, from tight canyon to open valley.
Section C is a lazy 5- to 6-hour float through open prairie with no significant whitewater. The current recommendation from experienced floaters is to take out at Swallow Canyon rather than continuing to Swinging Bridge, which adds miles with diminishing returns.
Shuttle services are available through most Dutch John outfitters. Self-shuttles work but eat into fishing time, especially for Section C where the drive to Indian Crossing is over 20 miles on dirt road.
Rod: A 9-foot, 5-weight is the workhorse for general nymphing and dry fly work. A second rod (3-weight or 4-weight) is nice for the delicate dry fly presentations on Sections B and C.
Tippet: Pack 4X through 7X. The trout here are leader-shy, and 6X fluorocarbon makes a real difference on sunny days. Bring plenty of 5X and 6X. You will go through more tippet than you expect.
Must-have flies: BWO dries and emergers (sizes 18 to 22), PMD dries (sizes 16 to 18), Griffith's Gnats (sizes 18 to 22), zebra midges (sizes 18 to 24), Pat's Rubber Legs (sizes 8 to 10), and a few San Juan Worms for high-water days.
Wading: Felt-soled boots are strongly recommended for Section A's slippery rocks. Rubber soles work on gravel bars but feel treacherous on the algae-covered boulders.
Other essentials: Polarized sunglasses (critical for sight fishing in this water), a rubber-mesh net, and hemostats for quick hook removal.
Most of your fish will come subsurface. The standard Green River rig: a larger lead fly (San Juan Worm #10 or Pat's Rubber Legs #8), with a smaller dropper (zebra midge #22 or RS2 #22) trailing 12 to 18 inches behind. Use 4X fluorocarbon to the lead fly, 5X to 6X to the dropper. Small strike indicators are essential in this clear water, where standard bobbers spook fish.
Get your depth right and let the flies drift naturally without drag. Mend constantly. These fish have seen a million bad drifts.
When fish are rising, and they rise often on the Green, the dry fly fishing can be outstanding. Keys to success:
The best dry fly windows are overcast afternoons during BWO season (spring and fall) and the midge hatch window from roughly 10am to 3pm year-round.
Streamers come into their own on Section C, where big browns respond to Woolly Buggers (#6-8, olive and black), sculpin patterns, and articulated leeches. Fish them with slow strips and long pauses along undercut banks. Early morning and late evening are prime streamer hours, though they produce throughout the day in winter.
Where is the best place to fish the Green River?
Section A from Flaming Gorge Dam to Little Hole is the most popular stretch, with 8,000-14,000 trout per mile and excellent wade access at flows under 1,200 CFS. For bigger fish with more solitude, Section C below Indian Crossing holds trophy brown trout reaching 25-30 inches, though densities are lower. Check current flows on RiverReports to pick the right section for your trip.
What is the best time of year to fish the Green River?
The Green River fishes well year-round thanks to consistent tailwater releases from Flaming Gorge Dam. Spring and fall offer the best dry fly action with BWO and PMD hatches. Summer brings the legendary cicada hatch with explosive topwater fishing. Winter midging is productive but demands cold-weather preparation. Dutch John sees sub-zero temperatures regularly.
How many fish per mile on the Green River?
Section A holds 8,000-14,000 trout per mile in peak electrofishing surveys, making it one of the most productive tailwaters in the American West. Section B averages around 3,000-5,000 trout per mile with Class II rapids. Section C has the lowest density but produces the biggest fish: brown trout exceeding 25 inches are caught every season.
Everything this river feeds, by month. Filter by bug, category, or fly size, and switch the axis to see what comes off at what time of day. Pulled from our western hatch and forage guide.
Before your trip, check:
The Green's tailwater nature means stable, predictable flows most of the time. Unlike freestone rivers, you will not wake up to blown-out conditions after a thunderstorm. But checking flows before you drive helps you understand fish positioning, wading feasibility, and which sections will fish best.
Set up flow alerts on RiverReports so you know immediately if dam releases change your plans.
Weekly flow updates and fishing intel.
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