Henry’s Fork, June 5th, 2024
The lower river is the best place to catch the giant stone fly hatch. Good numbers have yet to fly along the upper river, but upcoming warm weather will bring them out big time there. Also such weather will bring out recreational boaters, so some ” Share the River ” actions will be necessary in many locations. Consider that other major aquatic insects will begin appearing in good amounts soon to supplement those (large stoneflies, BWO, midges, caddis) being active with the warming weather.
Water Quality Information from Dr. Rob Van Kirk’s SWE Report Filed Yesterday
Water quality is excellent throughout the watershed. Turbidity is lower than average for this time of year throughout the watershed, and dissolved oxygen is above average. Water temperatures were cooler than average yesterday and even a little below the optimal range for trout growth and activity in most reaches. Hatch timing is within one day of average at most locations but is likely to move up a little over the next two weeks as much warmer weather is in store.
Rob Van Kirk, Ph.D.
Science and Technology Director
P.O. Box 550
Ashton, ID 83420
208-881-3407 CELL