We can now say with some confidence that the Henry’s Fork below Ashton Reservoir is finally fishing well again. It generally fishes decently throughout the heat of the summer on streamers in the evening, but that means getting to the take out in the pitch darkness. With fall on the way, it has been getting darker earlier, and the evenings have been cooler. The shorter days and colder air temperatures have kept the water consistently cooler. The browns are already getting colored up, and starting their pre-spawn assault on anything that swims. An evening float just a few nights ago resulted in a few nice fish in the boat and many strikes and chases in between. The slack water areas (Chester backwater and Fun Farm) have had some good trico action (trico spinner patterns in 20-24). This event can bring a lot of fish to feed at the surface, but at the same time can be utterly maddening. In the afternoon, fish in the lower have been consistently eating large hoppers.
Box Canyon is on the low side at 736 cfs. This opens up some wading opportunities, and makes missing rocks in a drift boat a chore. Fishing has been good with streamers and full on nymph and bobber rigs. As the river opens up into the Last Chance section, terrestrials have been fishing well. A hopper with a sunken ant dropper is a very effective way to fish this area.
by Daniel Lane at our Ashton Fly Shop
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