The Green River in Southwest Wyoming delivers a rugged, high-country fly fishing experience. This stretch of the Green known by many as "The Upper" flows out of Fontanelle Reservoir and is known for producing some of the largest—and most aggressive—trout in the region. Anglers can expect opportunities at Rainbow, Brown, and native Cutthroat trout, and the often under appreciated but still majestic Rocky Mountain Whitefish.

Anglers can access this section at Warren Bridge and other public easements along U.S. Highway 191. Some areas require permission to cross private land. Wyoming fishing regulations apply, with some artificial-lure-only restrictions. Always check current rules and practice ethical fishing to help preserve this prime fishery.

The Green River fishes well year-round, but the best conditions vary by season. Spring offers excellent pre-runoff fishing, with hungry trout actively feeding on nymphs and streamers. Summer provides prime dry fly action, especially during hatches of mayflies, caddis, and terrestrials. Fall is a great time for targeting large browns preparing to spawn, while winter fishing can be productive in tailwater sections where flows remain steady. Checking water levels and weather conditions before a trip is essential, as runoff in late spring can make some areas difficult to fish.

Updated by Travis Vernon 7.1.26

Currently the flows are hovering right around 635 CFS. Since the water is so low there are a lot of wading opportunities. Lately we have been catching a good amount of cutthroats as they move off the redds (please still don’t pound the fish who are spawning or walk in the spawning areas) and have been feeding more. We are seeing some great rainbows and browns also being caught. Also, saw an area that had a pile of caught and killed whitefish that had been abandoned on the shore. This is illegal and if you don’t want to catch whitefish then fish dries. You still may catch some but let them be. The myth that they are competing with trout are not true. They are a native fish, fun to catch, and very good to eat. Don’t give into the propaganda from whitefish haters.

Seeing a good amount of fish looking up chasing caddis, sallies, and PMD’s. Cicadas could be heard in the bushes but the fish were not as interested in the bigger bugs but we did catch a few on bigger foam but most were on droppers and smaller dries. A great combo is a caddis and a pmd emerger. Sow bugs, caddis, leaches, crayfish, and pmd’s are still the primary fare for the bobber fisherman.