Henry's Fork Fishing Report - June 4, 2026
Henry’s Fork Streamflows
Island Park Dam: 588 cfs
Ashton Dam: 1090 cfs
St. Anthony: 1330 cfs
Fall River: 1030 cfs
With some fine days of dry fly fishing behind us and more to come, we are enjoying our time on the Henry’s Fork at the moment. Fishing has been good overall but not very consistent lately. Expect more of the same in the weeks to come, with fishing and flows varying from day to day. Water temps are cool, clarity is good, flow is low for the date, fish are biting. Salmonflies are pretty well gone by now, but there are Golden Stones throughout the river. PMDs and caddis can be found in most reaches as well, with other hatches on the way!
Low flows have the tendency to concentrate angling pressure at times, being mindful of other anglers is a good place to start with and keep in your mind throughout the day. The insights you learn by observing other anglers can be as valuable as your own time spent fishing.
Box Canyon
The Box has been low this last week after flows came down in anticipation of last weekend’s rainy weather. Expect increasing flows, at times daily, in the coming weeks. Golden Stones will be around just enough to keep a dry/dropper rig in play, or even a straight dry fly run on a fair weather day. Low flows concentrate fish and increase competition, stripping a leech or olive zonker can be productive during periods of low light. Day to day will find anglers nymph fishing under strike indicators, this being the most productive method in the Box. 5-6’ from indicator to flies should do it, and anglers will do well to adjust between B, BB and no weight throughout the canyon. Generally, bug selection should be for small flies imitating midges, PMDs, March Browns, and Caddis. For nymphs we like: Rubberlegs and 101 Stones #8-10; PTs, R/L Tactical PTs, Split Backs, Frenchies, Rednecks #14-16; Hare/Copper, HP Tan and Olive Caddis Pupa #14-16; red and black Zebra Midges #14-20. A variety of perdigons will be useful as well, we like the red Jig Napoleon, PMD Jig Frenchie, Bullet Quill, Olive Hot Spot, Spanish Bullet, and Black Daggers #14-18.
Railroad Ranch
Closed until June 15th
Canyon Country
These are great days to be enjoying the canyons of the Henry’s Fork, water is in great shape and flows aren’t yet too high for flies to penetrate some of the more difficult lies. A high viz stonefly with a stonefly nymph hanging below is pretty hard to beat in these fast pocket water reaches. Golden Stoneflies are still present in here in small numbers, but enough to keep some interest alive.
Warm River to Ashton
Good trout fishing for small and medium sized fish with occasional large surprises served up daily. This reach has been fishing well for all types of anglers, it’s a section to be enjoyed by beginner, intermediate or advanced angler alike. Hatches of caddis and PMDs, with occasional Golden Stones around are keeping things interesting. Green drakes on the horizon make it even more so! Generally, the same fly selection as the recommendations for the Box Canyon will be a good start, but adding some dry flies imitating these bugs to your selection will be a good idea. A keen eye is rewarded in here this time of year, keep your eyes open and looking for opportunity and you’ll occasionally find it.
Below Ashton Reservoir
The lower river has been in pretty good shape here lately, with some good days of fishing followed by more challenging ones. There are bugs around, good numbers of caddis, PMDs, and some Golden Stones still flying around. Target fishing is out there, but anglers will need to look for it, and find something to fish with in the in between. Dry/dropper rigs are the norm but keep that dry fly rod close by and keep those eyes scanning for opportunities. Spinners in the mornings and evenings, caddis throughout the days, a variety of stoneflies from time to time, and Green Drakes on the horizon down here. Exciting times ahead, be sure to come armed for battle with tricky fish, low flows make things sneaky and challenging down here.
Good luck out there!
