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 6.4.26

Currently at 639 cfs and while water is quite low it is fishing well. Since the water is so low there are a lot of wading opportunities. There are still a fair amount of rainbows and cutthroats on redds so please avoid them and don’t tread on the redds.

Seeing a good amount of fish starting to look up chasing caddis. Cicadas could be heard in the bushes and we should see some yellow sallies and pmds soon. Sow bugs, caddis, leaches, crayfish, and bwo’s are still the primary fare. Seeing a few more fish rising and hopefully we get more into the hatches as the weather begins to warm again.