Fly Fishing Wind River - Wedding of the Waters

Fly fishing Wind River below Boysen Reservoir takes place in the dramatic Wind River Canyon and the famous Wedding of the Waters area, where the Wind River officially becomes the Bighorn River. This tailwater, fed by Boysen Reservoir, features clear, cold flows year-round that support a thriving trout fishery. Rainbow Trout are the headliners here, aggressively feeding in the swift currents, with Brown Trout present as well (often larger but fewer in number). Wyoming Game & Fish also stock some Yellowstone Cutthroat Trout in this stretch to bolster native species representation. Water flows are regulated for irrigation and power, typically ranging from 300–1000 CFS through summer – wading is best when flows are moderate (~300–600 CFS) and clarity is excellent thanks to Boysen Dam's sediment capture. Access to the tailwater is outstanding. Highway 20 follows the river closely through Wind River Canyon, with turnouts and trails leading to many prime holes amid the steep canyon walls. The Wedding of the Waters area just downstream of the canyon (near Thermopolis) is especially popular – here anglers can park and fish the productive runs where the river exits the canyon. Hatches are impressive: midges emerge year-round, with spring bringing thick Blue-Winged Olive and caddis hatches that blanked the water and get trout feeding on top. Summer sees yellow sallies and Tricos, while fall brings another round of BWOs. The rainbows here are tuned in to the bug life – on many days a well-presented dry or emerger during a hatch will out-fish nymphs. Nymphing, however, remains very effective (and necessary during non-hatch periods): small midge pupa, mayfly nymphs, and annelid patterns drifted through the riffles will hook trout consistently. Streamer fishing can turn up big browns, particularly in low-light conditions or during the fall spawn period. The scenery in the canyon is spectacular – sheer cliffs tower above, and bighorn sheep are often seen grazing along the roadside or riverbanks (a fitting mascot for the Bighorn River). Trout average 12–16 inches here, with many rainbows stretching 18 inches or more; their vibrant colors and spirited fights in the strong tailwater currents make each catch memorable. Because of the year-round stable flows, the tailwater fishes well even in winter whenever temperatures allow (Thermopolis' hot springs keep the river unfrozen). Fly fishing below Boysen Reservoir is a must-do for any serious Wyoming angler, combining easily accessible yet challenging water, trophy trout potential, and an unforgettable canyon backdrop in one of the state's most impressive river corridors.