Flows out of Island Park Reservoir currently stand at 819 cfs
Henrys Fork- Box Canyon - Island Park, ID (Fremont County)
by Mike Lawson
At the time of writing this report the flows out of Island Park Reservoir currently stand at 819 cfs, this flow is a little higher than what most would like to fish the box at and might make things a little difficult for the wading angler to get around, the best access for wading would be right at the boat ramp below the dam offering plenty of room for parking and walking around. The salmon flies have yet to hatch in numbers on the box, however you might find adults crawling and flying around where the Buffalo River dumps into the Henry’s Fork due to the warmer water found at the confluence and others stretched through the box. The adults should hatch in numbers here soon so be on the lookout. For this reason, throwing a dropper rig with a size 4 or 6 rubber legs underneath will be your best bet at finding fish still eating the crawling nymphs while also giving yourself an opportunity to potentially fool a couple on the dry. Mixing in other nymph patterns like big zebra midges, worms, and caddis’ can also help increase your chance of hooking up. The adults should start to hatch in good numbers the next couple days as water temperatures warm up.
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