Almost time for large dries...

Teenage Entomologist

Gotta love the pteronarcys.
#1
Right now, the large stonefly species in rivers and streams are almost at their mature size. Here are two of my own patterns I've been waiting to try out. Swart's Supernatural Stones.

Golden Stone: Female Ovipositor: #8
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Salmonfly: Female Ovipositor: #4
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Skwala Supernatural Stone coming soon. And these two nymphs below aren't my own pattern, but I tied them; a local favorite.

Mercer's Poxyback Beaded Biot Golden Stone
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Mercer's Poxyback Beaded Biot Salmonfly.
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#2
I don't see too many stones in my immediate vicinity(lakes and tailwaters), but I love it when I encounter them on some small freestones in the area. So I keep a few stimis tied and in my chest pack just in case.
I usually get luckier with the timing of October caddis, and that's what the stimulators end up getting used for.
 

Teenage Entomologist

Gotta love the pteronarcys.
#3
Since very, very few stoneflies live in lakes, there's almost no point in using stonefly patterns on lakes. My favorite place to fish is the Sacramento River, one of the greatest tailwater fisheries in the world. There's tons of large to small stonefly species in there, and trout can't resist taking a stone.