The Green River is one of the great fly fishing rivers of the American West — a 730-mile journey from its headwaters in the Wind River Mountains of Wyoming to its confluence with the Colorado River in Utah, offering dramatically different fishing experiences across its length. No other river in the region transitions so completely from mountain headwater to tailwater fishery, and few offer the combination of solitude, scenery, and world-class trout that the Green delivers across its Wyoming and Utah sections.
Upper Green River — Wyoming Headwaters to Warren Bridge
The upper reaches of the Green begin in the glacially carved cirques of the Wind River Range, where small clear streams join to form a river of surprising size by the time it reaches the high desert plains near Pinedale. This section holds native Snake River Fine-Spotted Cutthroat, brown trout, and rainbow trout in braided channels and undercut banks that reward careful wading and accurate presentations. Warren Bridge on Highway 191 is the primary access hub, with BLM Road 5201 providing 12 public fishing accesses north of the highway. The water is freestone — responsive to weather, runoff-affected in May and June, and at its best from mid-July through October when summer hatches peak. Terrestrials define the fishing here in summer: hoppers, ants, and beetles draw explosive surface takes from cutthroat that see minimal pressure. The crowds are minimal, the scenery is extraordinary, and the fishing reward for those willing to cover water is exceptional.
Seedskadee National Wildlife Refuge — Wyoming
Below Fontenelle Reservoir, the Green enters Seedskadee National Wildlife Refuge — 26,000 acres of protected habitat where the river runs through cottonwood-lined banks and broad meanders. Fontenelle Dam creates a tailwater effect that sustains fishable temperatures into late summer, and the Seedskadee section holds trophy-class brown trout. Float fishing dominates — the refuge is large, access points spread out, and drift boats cover water most efficiently. Woolly Buggers and sculpin patterns in the evenings draw aggressive strikes from large browns. Wildlife is spectacular throughout: moose, bald eagles, sandhill cranes, and pronghorn are regular companions on a Seedskadee float.
Flaming Gorge Tailwater — Utah
Below Flaming Gorge Dam in northeastern Utah, the Green transforms into one of the finest tailwater trout fisheries in North America. The dam's hypolimnetic releases create constant cold-water temperatures that sustain 16-to-20-inch trout as the statistical norm. The A Section — seven miles of catch-and-release, artificial-only water from the dam to Little Hole — is where most fly fishers focus. Fish density and average size are extraordinary, and the canyon scenery of red and ochre sandstone walls rising 1,400 feet above the river is among the most dramatic in the tailwater world. The B Section from Little Hole to Indian Crossing adds nine miles of less-pressured water. The remote C Section through Browns Park holds some of the largest fish with minimal angling pressure. Year-round midge activity, reliable Blue-winged Olive hatches March through November, legendary PMD hatches May through July, and fall Trico spinner falls create a 12-month hatch calendar that keeps serious anglers returning season after season.
Hatches and Tactics
Midges are the foundation across all sections — effective every month, every condition. PMDs define the Flaming Gorge tailwater from May through July. Hoppers and terrestrials define the upper Wyoming sections July through September. BWOs drive the best fishing of fall across the entire system. Nymphing with Pheasant Tails, Hare's Ears, and San Juan Worms is consistently productive. The upper sections reward hopper-dropper presentations in summer; the tailwater demands long leaders, fine tippets, and dead-drifted midge clusters in winter.
