Henry’s Fork, July 5th, 2024

Cool Water Prevails in the Tubs

Presently, flavs and PMDs make up the major mayfly activity throughout the river. Notice that the size of PMDs is diminishing to make dun, emerger and spinner patterns reduced to the 18-22 range best to simulate them. Brown drakes are hatching from upstream slower waters but are well past their peak in numbers. Water quality is good nearly throughout the river except below St. Anthony where temps up to 70 deg. F. are present. Speaking of warm water; with hot weather coming next week, the river below Ashton Dam will warm to the point that daytime hours will limit fish activity making early and late in the day the times for good fishing. This change will eventually happen on the upper river. Consider that not only warming air but also bright sunny times contribute to making this change. The positive aspect of hot sunny days is that they will bring on the terrestrial insects throughout the river. Check your stock of terrestrial insect patterns!