Henry’s Fork, July 23rd, 2022

Box Canyon, Warm River to Ashton, and Ashton Dam to Chester backwater sections are seeing a big increase in recreational floaters. The peak of this activity is usually from late morning to late afternoon. For the latter two locations, this time stretch coincides with the slowest fishing success. Minimize your interaction with these folks by fishing early AMs and during evenings when fishing success is much likely best during these warm days. Everywhere on the river, bank side terrestrial insects are taking over as being a most important food form for foraging trout. Carry fly patterns that simulate them and concentrate your presentations to banks above good holding water.

Here are headlines from Dr. Rob Van Kirk’s Henry’s Fork drainage water report compiled yesterday, July 22nd.

Headlines:  

• Dry weather with temperatures 2-4 degrees F above average is expected to continue for the foreseeable future, as drought redevelops along the northern edge of the watershed.
• Current USGS gage readings are around 80 cfs higher at Island Park and 300 cfs higher at Ashton than actual stream flow.
• At an outflow of 1423 cfs yesterday, Island Park Reservoir is 77% full, right at average for the date.
• No large changes in irrigation-system management are expected for another week or so.

Here are