South Fork & Henry's Fork Fishing Reports

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Fishing Reports

Jimmy's All Seasons Angler / Fishing Reports

Today at Jimmy’s, May 11th, 2021

                Keeping a Fly Fishing Journal Pays Benefits


It took me half a dozen fly fishing years to consider keeping a journal to capture details of each outing. Finally, a fly fishing friend who kept a journal got my attention:

“With the number of times and the different waters you fish, you are losing information that would much help choosing where and when to go and what to use during any future trip.”

Dave was a detail guy, so every bit of information that impacted his fly fishing success during an outing went into his fly fishing journal.  I watched him jot down thoughts in a little notebook even while fishing!

“ Yes,”‘he said,”It would mean that after each outing part of the evening or the next day would be devoted to compiling significant details.”

His suggestion seemed at first to me like an exercise in futility. But I dutifully began, and after the first year with about fifty outings described, the “light came on”, and I wished I had started earlier. That revelation came around about 1980 in the days before personal computers were available and notebooks or card files provided information storage. As the 1980s progressed, I could see trends in the captured information developing that provided detail gems that helped in deciding where to fish and what to use while doings so. Since then updating my journal after each outing  has become the final part of any outing.  Things are different now with such as WORD or EXCELL providing convenient ways to capture and store information, so sometime in the early 1990’s I converted my journal electronically.

So what should be included in a fly fishing journal? That’s a great question, and for the first few years I added categories as I progressed through each season.  But here are some basics that should be captured.


Name of Water Fished and Specific Location (include any USGS gage flow reading that influences water fished )

Date and Time of Day Fished

Weather Conditions

Water Conditions

Insect Activity and Other Food Items Present for Fish

Equipment and Flies Used

Catch for Each Fly

Comments ( I include travel conditions especially on back country roads and crowd conditions)


Here’s how the entry for each outing looks in my journal. Consider it just an example, so construct one to your preference, and add anything else that describes your experience and fishing success.


Blackfoot River

Date:  7/14/2019    Friday Allen Ranch gage 200 cfs       Where: Blackfoot River Wildlife Management Area

Time of Day:  1100-1730

Weather:  Bright, Building cumulus mainly to east, Nice, Increasing breeze, High Barometric Pressure, Air temp to low 80s

Water:   Somewhat high, Some discolor, Weeds growing, 57 Deg. F. at 1200, 60 Deg. F. at 1600

Emergences:  Hoppers, ants abundant, caddis activity increases with time, very few PMDs, some rises

Equipment and Flies Used: WF-5-F/S, 9 ft, 2X tippet, WF-7-F, 9ft, 3X tippet

     Bead Head Peacock Leech #6: 7 cutts; one is 21.5 “, others 18″, 16” on down to small, some hits

     Blond Humpy #12: 3 cutts one is 17” others small, few other hits

 Catch:                                                                                       10 cutts

Comments: Patterns simulating drifting earthworms may be best when river is this high. Missed another big cutt using leech pattern. Small fish rising & LeRoy tries for them, but got nothing bigger than 14”.  Two guys fishing behind us. Fish not keying on hoppers yet, may be full of worms.  IDF&G fisheries biologist Arnie from Pocatello office present doing fish survey.  He says cutts holding their own here.  Roads are quite dusty and “washboardy” in places.




Still Waters, May 8th, 2021

The current strong winds have made fishing on our larger reservoir somewhat dangerous.  Therefore we have little to report on fishing, butwe  urge caution on such as American Falls, Blackfoot, Chesterfield, Daniels, Hebgen and Palisades.


Henry’s Fork, May 8th, 2021

Any day of the week you choose to fish the lower river, you will have plenty of company. Boats and walk-in anglers are aplenty especially from Ashton Dam down to Chester Dam. The reason is that this part of the river currently offers the best  stream fishing in the region.


South Fork, May 8th, 2021

Flow out of Palisades Dam was raised to 10700 cfs (12200 cfs at Heise, 5410 cfs at Lorenzo ) Yesterday. This flow is at the normal for the season. Best fishing remains through presenting  rubber legs and streamer patterns. Top water fishing is minimal with only scattered midge activity.


Today at Jimmy’s, May 8th, 2021

                                                                                             All Seasons Angler 2021 Casting Class

Casting Class Pd

Class Location on Events Center Drive

We offer this class schedule each summer to help get you on the water with basic casting skills. We recommend that you have your own equipment for the class because having such provides becoming familiar with which you will be fishing. However, we can provide tackle if needed. Here is how the 2021 schedule unfolds.


May 12th                        Wednesday                      6:30-8:30 PM

May 18th                        Tuesday                            6:30-8:30 PM

May 20th                       Thursday                          6:30-8:30 PM

May 26th                       Wednesday                      6:30-8:30 PM

June 1st                         Tuesday                             6:30-8:30 PM

June 9th                        Wednesday                       6:30-8:30 PM

June 17th                       Thursday                           6:30-8:30 PM

June 22nd                    Tuesday                              6:30-8:30 PM

June 23rd                      Wednesday                       6:30-8:30 PM

June 29th                       Tuesday                            6:30-8:30 PM

July 2nd                        Thursday                           6:30-8:30 PM

July 7th                           Wednesday                      6:30-8:30 AM

July 13th                        Tuesday                              6:30-8:30 PM

July 15th                        Thursday                            6:30-8:30 PM

July 21st                       Wednesday                       6:30-8:30 PM

July 27th                      Tuesday                              6:30-8:30 PM

August 4th                    Wednesday                       6:30-8:30 PM

August 10th                  Tuesday                               6:30-8:30 PM

August 19th                  Thursday                             6:30-8:30 PM

August 24th                 Tuesday                              6:30-8:30 PM

August 24th                 Wednesday                       6:30-8:30 PM

Here are particulars:

LOCATION: Pond (see above photo) on Events Center Drive off South Utah Avenue

FEE: $20 per student per session.


Brief Intro/Refresher to Casting:

If you can’t attend one of our classes but need a brief introduction to casting or a refresher, give us a call to set up a time with one of our shop staff. These short 15 to 20 minute classes are here at the shop and are perfect for those who need some quick instruction for an upcoming trip or a quick refresher on the basics. There is no charge for this class.

Contact the shop (208-524-7160, [email protected]) to enroll and for more information.


South Fork, May 4th, 2021

The river features cold, clear water with flows not raised enough to inhibit fishing and at present being below normal for the season. The best patterns of note seems to be any of the numerous rubber legs around.


Henry’s Fork, May 4th, 2021


Courtesy Dave Pace

This weekend a lone adult giant stone fly was spotted by a team of drift boat fly-fishers along the river between Stone Bridge and Ashton. Certainly an “early bird”, it best suggests that it is time to offer giant stone fly nymph patterns when fishing the river from Warm River to Chester. For now the other patterns we have suggested in recent fishing reports ( BWO, caddis, and midge life cycle patterns, streamers, and small nymphs of choice) will work fine until later this month when the bulk of the big stone fly activity begins.


Today at Jimmy’s, May 4th, 2021

We will soon offer our Fly Casting class schedule on this web site.    For this year we  have a location change.  Rather holding these at Tautphaus Park, we will move to the Snake River Parkway ponds.  We will give the exact location when we place our class schedule on this web site.


Small Streams, May 4th, 2021

Flow out of Blackfoot River Reservoir was essentially doubled to 193 cfs a few days ago. Look for more increases in flow here as we get further into the irrigation season. This month run-off will begin in our small streams draining high country, and back country roads will begin to open.  We will get information on these events and place such in our fishing report to help with decisions on where to fish such waters.