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Water is a little high causing a majority of the fish to group towards the bank, with a few feeding in the middle. Dry flies are catching fish! Throw a size 12 or 14 elk hair caddis at the bank. Also try a rusty spinner later in the evening.
Flows out of the Island Park dam are currently 537cfs, with a big jump on April 24th. Below Ashton flows are steady at 1460cfs. With a few days between any major changes - fishing should be great!
After a wet and snowy weekend, weather has shaped up with high 60's to mid 70's in the forcast.
Spring runoff is underway with flows around 1,300 cfs near Ora. According to Dr. Rob Van Kirk or the Henry's Fork Foundation, spring runoff will likely be lowest in at least 35 years. Read Dr. Van Kirk's analysis regarding the recent storms in the area on the Henry's Fork Foundation blog. http://henrysfork.org/have-recent-storms-helped-water-supply
Silver Creek is currently experiencing record low flows, high water temperatures and low dissolved oxygen levels. In an effort to reduce stress on the fishery at the preserve, The Nature Conservancy is temporarily restricting access to Silver Creek for fishing. For more information: http://www.nature.org/ourinitiatives/regions/northamerica/unitedstates/idaho/placesweprotect/temporary-restrictions-to-fishing-access.xml
The water temp is like 70 degrees now and the fish are down deep so the only thing working now is throwing streamers on the banks and nymphing most of the time use a rubber legs stonefly and drop of some sort of a beaded nymph like a prince in about a size 12 or 14 that should work well.
It seems the really hot fishing below the Ashton dam is off a week or two. I fished using a caddis and had a couple fish strike and landed a small brown, but my hope was getting into consistent rising, which was not happening. Looking forward to the big mayfly hatches that usually start up in mid June. Even if the fishing is slow there is nothing better than being on the river. Good luck!