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Author: Bruce_Staples

Fly Fish Food Jimmy's / Articles posted by Bruce_Staples (Page 18)

South Fork, September 12th, 2023

No significant change in water conditions or fishing recommendations since our last report. However, if you want a top water fly fishing challenge the Warm Springs Pond on the river road above Heise is the place to try. A high water river channel, now dry because of reduced flows out of the Palisades Dam, feeds into the pond earlier in the season. That channel enters what use to be a small impoundment above the pond. It, too, is now only spring-fed and holds a few trout. Very large, but finicky brown and cutthroat inhabit the spring pond and feed on scuds, shrimp, and any emerging mayflies. A stealthy approach, long leaders, minimal wading, and precise casting are in order here for fishing success. Early in the day or evening visits are best times for fishing success.

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Henry’s Fork, September 12th, 2023

No killing frosts on the upper river to date. That means terrestrial insects remain numerous but spinner falls are diminishing. For the river below, same situation (excepting for BWOs), but brown trout are beginning to move, so streamers are in order during low light conditions. Some other good news is that recreational boating on the river is fading away on the river.

Headlines from Dr. Rob Van Kirks Henry’s Fork Drainage Water Status Report Filed September 11th.

  • Last week was average in temperature and wetter than average; water-year total precipitation is 111% of average with only 20 days remaining in the water year.
  • Diversion and lower-watershed stream flow targets continue to be met with no reservoir draft.
  • At an average outflow of 468 cfs, Island Park Reservoir has gained 159 ac-ft/day over the past five days and is 63.5% full, compared with 46.1% on average.
  • Water quality is excellent throughout the watershed in all measures.

Rob Van Kirk, Ph.D.

Senior Scientist

Henry’s Fork Foundation

P.O. Box 550

Ashton, ID 83420

208-881-3407 CELL

208-652-3568 FAX

[email protected]

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Still Waters, September 12th, 2023

Island Park Reservoir

The blue-green algae bloom in Island Park Reservoir has reached amounts making water toxic for human and animal consumption and contact. Thus washing hands and equipment and keeping pets away from these waters is much recommended. However, now that shorter and cooler days are arriving this bloom will eventually break up, and submerged springs will be safer to fish. Most of these springs are off the north shoreline at the west end of the reservoir. Good fishing can take place around these through presenting midge pupa patterns in red, olive or black colors, all under indicators.

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Small Streams, September 9th, 2023

In Blackfoot River Wildlife Management Area

All small streams not influenced by upstream reservoirs are at base level flows. This means fish will concentrate in deeper water where overhead cover provides best protection and cooler water offers more comfort. The river in the Blackfoot River Wildlife Management Area is a good choice to enjoy relative tranquility, scenery, and improved fishing. Terrestrial insect populations are at their peak here, and although submerged vegetation is also at the same, top water fishing can best good especially through presenting terrestrial insect patterns at the head of deeper waters and close to overhanging banks. Trout population is improving in this part of the river thanks to normal seasonal flow levels and recent alterations made by IDF&G personnel

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Henry’s Fork, September 9th, 2023

Dogs can be great companions during fishing outings

There are a few early in the day spinner falls left from Last Chance downstream through the Harriman State Park reach, but by late morning, it remains best to switch to terrestrial insect patterns especially hoppers and ants (with and without droppers). These should be presented close to banks through long, drag-free drifts. Doing such applies to anywhere on the river. Try presenting streamer patterns up tight to well vegetated banks any where along thee river especially during low light conditions. There have been no killing frosts of any consequence on the upper river to date.

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Yellowstone Park, September 9th, 2023

Firehole River and Nez Perce Creek

With respect to fishing this time of the season, Park waters seem to offer something for every fly fisher. For example, the fall season has begun on the Firehole River where cooling weather has dropped water temps to levels where trout become active especially during AMs. BWO and caddis life cycle and terrestrial insect patterns are effective once again. For the still water enthusiast, Shoshone and Lewis Lakes have cooled enough where resident brown and lake trout will respond to streamer patterns presented around submerged weed beds and drop-offs. Killing frosts are yet to arrive on a widespread basis, so terrestrial insect patterns remain effective on streams having meadow reaches. Such include the Lamar River and its tributary Slough and Soda Butte Creeks, meadows on the Gibbon and Yellowstone Rivers, and all Fall River Basin streams. Brown and rainbow trout have begun migrating out of Hebgen Lake and into the Madison River drainage within the Park, and will respond to streamer patterns. Tourist traffic is diminishing, crowds are down or yet to come on many waters, and fall colors will soon peak throughout the Park. So September is a great time to visit Park waters for some good fishing and to enjoy its unique scenery.

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Henry’s Lake, September 9th, 2023

Cooler, longer nights are beginning to awake late season fishing here. Cooling waters are starting to move fish away from depths to the shallows where they will forage on available food forms.

There is an extensive selection of effective flies ( once again, see Bill Schiess’s book ” Fishing Henry’s Lake” ) for successful fishing on the lake, but they are too numerous to present here. As fishing improves on the lake, however, we will receive information on effective patterns and will certainly identify such in order to help offer choices.

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South Fork, September 9th, 2023

Flows are beginning to drop enough to make the river a walk-in wade paradise (about 7300 cfs at Irwin, 7500 cfs at Heise, 3200 cfs at Lorenzo). Hopper-dropper combinations still work well along areas of overhead cover and vegetated banks up and down river. The the fall emergence of BWOs and mahogany duns is on the way and will peak during unsettled weather. Fall colors are also beginning, and their presence will make the river and its surroundings a beautiful place to visit.

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Jackson Hole One Fly Contest

This year’s One Fly Event is scheduled to take place September 7th-10th. This more that just a fly fishing contest, it is a major fund raising action for protecting the Snake River salmonid population. Go to the Jackson Hole One Fly Contest web site to see details and purpose.

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South Fork, September 5th, 2023

No significant change has happened with respect to flow out of Palisades Dam, and the reservoir above is about two-thirds full. That means plenty of water to finish irrigation season demands as well as a good start in storing water for next year. The recent unsettled weather will help bring on a denser BWO hatch and begin a significant appearance of mahogany duns. Hopper-dropper combinations will be a great alternative for top water fishing in the weeks to come and streamer patterns will become increasingly effective as we move into autumn..

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