South Fork & Henry's Fork Fishing Reports

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Henry’s Fork

Jimmy's All Seasons Angler / Henry’s Fork (Page 12)

Henry’s Fork 10-1-16

With only 192 cfs coming out of Island Park Dam, it is time to wade Box Canyon rather than float it. Increasingly, presenting streamer patterns there will bring better chances for encountering large trout. Concentrate on presenting these in deeper holes and runs. Cooling and unsettled weather is just what is needed for improved fishing on the lower river. BWOs and mahoganies provide top water action and streamer patterns will be increasingly effective as we move through October. Presenting terrestrial insect patterns almost anywhere on the river will remain effective until a killing frost comes along.


Henry’s Fork 9-24-16

The recent stormy days are just what is needed to pick up fishing action on the lower river. Tiny BWOs and mahogany duns are emerging and attracting fish. With terrestrial insects still around in good numbers, and cooler water temperature, dry fly action will benefit. These will accompany the increasingly effective presentation of streamer patterns.  So stock that fly box with patterns appropriate for all these.


Henry’s Fork 9-13-16

Flow out of Island Park Dam is down to around 400 cfs. With such a low flow, streamer patterns are the best way to encounter the larger fish in Box Canyon. Concentrate your efforts on deeper holes and runs where there is the best overhead cover for the big guys.  Until we have a killing frost, look for the hopper fishing to hold up on other parts of the river. With the current unstable and cooling weather, BWOs and mahogany duns will become the principle mayfly species available to trout along much of the river.


Henry’s Fork 9-10-16

Almost anywhere you try the river (excepting Box Canyon where two-nymph rigs bring action) early AM tricos then mid day hopper activity can be expected to bring most reliable action from resident trout.  We are cooling down, so significant BWO and mahogany dun emergences up and down the river are in the near future. Weather predictions are for some stormy weather this coming week, so these could happen within a few days.


Henry’s Fork 9-6-16

With respect to the lower river, the best thing is happening.  That is the weather cooling down which means sooner or later BWOs and mahogany duns will be emerging. On the river in the Last Chance-Riverside portion it’s still the same: morning trico spinners and terrestrial insect activity by late morning into afternoon hours are the best times to find action.


Henry’s Fork 9-3-16

Not a lot of change since our last report.  From Last Chance to Riverside early AM trico spinner patterns AM bring action.  Then as the day progresses presenting terrestrial patterns, especially those of the honey ant takes over for the same. We need more cool weather for fish activity to pick up on the river below Ashton Dam.


Henry’s Fork 8-23-16

For the Last Chance to Riverside section of river AM trico and mid day terrestrial activity offer the bet chances for action.  It is the time of year when presenting honey ant patterns is particularly effective. At sunset and after, consider drifting that hair mouse pattern through locations known to host very large trout. Two-nymph rigs using small bead head patterns seem to offer best action in Box Canyon. From Cardiac Canyon down to Ashton Reservoir presenting terrestrial insect and caddis life cycle patterns are effective late in the day. Presenting streamer patterns late in the day anywhere in this water could get you into a fish of the year.


Henry’s Fork 8-13-16

From Ashton Dam upstream to the bottom of Box Canyon whether you are wading or float fishing, presenting terrestrial insect patterns is effective especially during afternoon hours. Fishing trico dun & spinner patterns early in the day is another way to action, but a bit tougher on the eyes than presenting hopper patterns.


Henry’s Fork 8-9-16

It’s time to concentrate on presenting terrestrial insect patterns on the river from Last Chance down to Riverside. Ant (honey), beetle, cricket, hopper, and even deer or horsefly imitations should be in your fly box. Horse and deer flies will be the major airborne pests these days. So when they land on you, swat ’em as usual then pitch the remains into the river. Go on fishing, but if you hear a solitary take downstream, it is likely a trout taking that deer or horsefly you just dispatched.  A purist may accuse you of “chumming,” but you now have a great clue as to what the trout will take!


Henry’s Fork 7-30-16

The outflow from Island Park Dam has cleared resulting in much better fishing in the river below  down to Riverside Campground. The reason for this rather sudden clear-up seems obscure, but a good analysis for its presence and of the previous suspended residue within can be seen on the 7/22/16 Henry’s Fork Anglers fishing report. Mike Lawson wrote it. This guy’s life time of Henry’s Fork experience more than matches that of ALL HF enthusiasts that walk into his business. When he writes/speaks on the Henry’s Fork, it is time to read/listen.

If I were going to fish the river below the dam and Box Canyon, I would concentrate a variety of terrestrial patterns on board. With respect to mayflies, flavs and PMDs are decreasing in the Last Chance-Harriman reach, but speckled duns are coming on. I’d do the same with respect to terrestrial patterns in the Cardiac Canyon reach, but also have large stonefly nymph patterns on  board and hope for some overcast weather (even a passing thundershower (we sure need moisture anyway)) which makes for the best time to present them.