South Fork & Henry's Fork Fishing Reports

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Henry’s Fork

Jimmy's All Seasons Angler / Henry’s Fork (Page 33)

Henry’s Fork 11-10-2009

We have word that the Ashton Dam is being tested for integrity.  Water levels  out of the dam rose about 200 cfs on November 9 in order to drop reservoir levels needed to perform the tests.  It is planned to lower flows out of the dam by 200 cfs on November 13th.  So be aware that this action could impact fishing below Ashton Dam for a few days.

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Henry’s Fork 11-09-09

Fishing on the Henry’s Fork is still good. Look for Blue Wing Olives in the afternoon. Nymphing and Streamer fishing have been producing a lot of good sized trout as well. Keep and eye out for trout to start eating midges, below the surface and on top as we continue to see cooler weather.

We have been contacted by the Henry’s Fork Foundation and they informed us that they are making some improvements to the Box Canyon and the Riverside Boat Ramp and to expect these ramps to be closed for about a week.

We also received some information regarding Ashton Reservoir:

On Monday, November 9, 2009, we will be increasing outflow from Ashton Reservoir by approximately 200 cubic feet per second above inflow to the reservoir.  This will cause the reservoir level to decline approximately one foot per day.  We will be maintaining this rate through Friday, November 13, 2009, or until we reach Elevation 5147.  The reservoir is  presently at Elevation 5152.

Saturday, November 14, 2009, through Monday, November 16, 2009, the reservoir will remain at Elevation 5147.

Starting Tuesday, November 17, 2009, outflow will be reduced approximately 200 cubic feet per second below inflow to begin  refilling the reservoir approximately 1 foot per day. This will be maintained through Saturday, November 21, 2009, or until the reservoir reaches Elevation 5152.

During this time frame we will be testing generating equipment to determine its ability to operate at lower reservoir levels.

Mark Stenberg
PacifiCorp Energy
208 852-5507

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Henry’s Fork 11-03-2009

For the lower river rely on BWO life cycle patterns and steamers. For the upper river BWO life cycle patterns bring action around Last Chance.  Egg patterns and streamers bring action in Box Canyon and the Tubs.

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Henry’s Fork 10-27-2009

Still pretty much the same for the lower river: streamers for migrating browns and BWOs for top water fishing. The weather has been great fo both with cloudy unsettled conditions. So get out and enjoy. For the upper river BWOs are active around Last Chance, and streamers are becoming more effective in Box Canyon.

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Henry’s Fork 10-19-2009

It’s much like the South Fork: BWO life cycle patterns or streamers. These are the best choices for action up & down the river.   The weather is right, crowds are down, insect pests gone, and the time of year is right.  Get out and enjoy!

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Henry’s Fork 10-15-2009

Take your pick: streamers or BWO life cycle patterns. Browns are getting more active on the lower river as spawning season is just around the corner.  Any streamer pattern will do if you place it in the right spot., and low loight conditions make for better chances.  On overcast days, BWO activity begins a bit earlier and seems more intense.  So pick your preference; streamers or BWOs.  Or do a combination.

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Henry’s Fork 10-10-2009

Take your pick from two extremes: BWO life cycle patterns or streamers! This cool, unsettled weather we are having makes both the best way to fish up and down the river. For streamers, any low light conditions will make for best fishing. For the BWOs, PMs and overcast conditions will make for the best success.

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Henry’s Fork 10-06-2009

With all this blue winged olive weather you do not need any more hints as to what’s working throughout the river.  PMs are best, but nymphs early in the day will also be effective.

But do not overlook streamers!  Flows are low (1500 cfs at St. Anthony, 1100 cfs at Ashton, 300 cfs in Box Canyon above Buffalo River) so there is plenty of locations to present streamers during low light conditions.  Streamer fishing will be the most effective way to encounter large trout here as we move through the fall months.

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Henry’s Fork 9-29-09

Stormy weather should bring on more BWO activity and resulting feeding up & doen the river. The same is true for streamers on the lower river, so be sure to have both types in your fly box.  Trico action continues on parts of the river, but to enjoy the best of it you must be an early riser.   Terrestrial insects are still active and trout are interested in them, but killing frosts are coming.   So enjoy the remaining days when hoppers, beetles and ants bring action, especially on the upper river.

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Henry’s Fork 9-26

Baetis should be in full swing on the lower river around Chester and Ashton. Overcast days will help these hatches. The brown trout are starting to get active as we get closer to the time when they spawn. We have had reports of brown trout starting to be more aggressive on streamers in the last week. Hoppers are still working well in the morning and in the evenings on warm days.

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