Henry’s Fork, June 29th, 2024
Mayflies still reign supreme along the entire river. Drakes are still around, PM flavs are hatching, PMDs are throughout the river existing as emergers on through spinners. Caddis activity peaks in the aternoon, and a few golden stoneflies remain. Bring life cycle patterns for each and you will experience good action. In Box Canyon and lower Coffee Pot below the rapids dropping a nymph pattern under such as your favorite golden stonefly adult pattern. Be patient with your fellow fly fishers in high use areas and tolerant of recreational folks a many of them have yet to develop an on the water etiquette..
Water Quality and Aquatic Ecology Information From Dr. Rob Van Kirk’s Henry’s Fork Drainage SWE Report , June 29th, 2024
Water quality was good to excellent in all measures in all river reaches yesterday. Clouds and cooler air temperatures kept water temperatures below 70 degrees everywhere except at Parker. Daily minimum dissolved oxygen concentrations were higher yesterday throughout the watershed than over the past 4–7 days. Hatch timing is average for the date at all locations except Island Park Dam, where it is about one day behind, and St. Anthony, where it is one day ahead. Given a forecast of near-average temperatures for the next week, I do not expect any substantial change in overall aquatic insect development rates over that time period.