Henry's Fork Fishing Report - May 28, 2026
Henry’s Fork Streamflows
Island Park Dam: 618 cfs
Ashton Dam: 1390 cfs
St. Anthony: 1290 cfs
Fall River: 893 cfs
Well, this week’s Henry’s Fork fishing report isn’t the typical one from the last days of May and first days of June. It’s much better than that! Fishing has been unseasonably good lately, with hatches triggered earlier than usual due to the mild winter and spring. These next weeks are likely to be some of the best of the year and conditions are good in the river from top to bottom. Keep an eye on flows as they are changing frequently in response to irrigation demand and weather.
Box Canyon
The Box is rolling out at a comfortable level for floating and fishing, and the fishing has been good in there. There are still some salmonflies around, at least until this weekend’s cool weather slows them down, and the memory of that giant morsel of food may keep fishing looking up after they’re gone for a few days. Otherwise, we’ll expect a return to indicator nymphing in the Box Canyon, with a focus on smaller insects resembling tan caddis, BWOs and PMDs. A well prepared box for the canyon should include: HF Salmonfly #6-8, Golden Chubby Chernobyl, #6-8, Razorback Salmonfly #6 for dry flies. For nymphs we like Rubberlegs #6-8,;PTs, R/L Tactical PTs, Split Backs #14-16; Hare/Copper, Tan HP Caddis Pupa #14-16; red Zebra Midges #14-16. Your favorite perdigons will work as well, but we especially like the following: Olive Hot Spot, Red Jig Napoleon, Olive and Black Spanish Bullets, Bullet Quill #14-18. Be sure to bring along both B and BB split shot and adjust for the water you’re fishing.
Railroad Ranch
Closed until June 15th
Canyon Country
The canyons of the Henry’s Fork are in good shape at the moment, with some salmonflies still lingering. It’s hard to beat a hi-viz stonefly dry with a rubberlegs stonefly underneath in a dry/dropper rig down here. If things get fickle, as they often can as salmonflies come to a close, bring along some fast-sinking caddis and mayfly imitations #12-14. Weather has been sneaking up on us, and these canyons are no place to be stuck without the right gear, so pack plenty of layers along with your 1X-3X tippet!
Warm River to Ashton
Fishing has been fun down here lately, with most of the quality trout being taken subsurface. That said, it seems everyday someone finds a great brown trout on a stonefly dry fly, so it’s worth staying the course for the dry fly purist! Otherwise, you’ll find success with nymphs below a dry fly or under a strike indicator, this really comes down to which depth of water you’re fishing. Fly selection is pretty much the same as that for the Box Canyon, tie one on and get after it!
Below Ashton Reservoir
Things are moving along on the lower river a bit earlier than we’re accustomed to, with PMDs, Caddis, Salmonflies, and Golden Stones all on the daily menu. There’s been some decent dry fly fishing here lately, and conditions are favorable for dry/dropper rigs as well. Indicator rigs will be useful if focusing on the deepest water sections, but for anglers looking to hunt some quality trout, some game can be found down here. For the coming week, it’s hard to say what we’ll see, but well prepared anglers will have a box stocked with tan caddis #14-16, PMDs #14-16, BWOs #16-18, Salmonfly and Golden Stone patterns #4-8. Optimistic anglers might even put some Green Drake patterns in there and keep a few Flavs on hand, just in case. With the hatches we’ve been seeing, spinner falls are a daily occurrence, so keep on hand a good supply of paraspinners in rusty, cream and olive, sizes #14-18.
Good luck out there!
