Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin

Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

Stream photos

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Skwala (Large Springfly) Stonefly Nymph Skwala (Large Springfly) Stonefly Nymph

Dorsal view of a Skwala (Perlodidae) (Large Springfly) Stonefly Nymph from the Yakima River in Washington

This Skwala nymph still has a couple months left to go before hatching, but it's still a good representative of its species, which was extremely abundant in my sample for a stonefly of this size. It's obvious why the Yakima is known for its Skwala hatch.

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27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.

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Hennys below Mio

Gtheory

Indianapolis - Grayling

Posts: 1

Gtheory on Dec 25, 2017December 25th, 2017, 2:45 am EST

Fished the late / light Hendricksons below Mio (Au Sable) last year and was left with the impression that the daily schedule is a little different there. What I mean specifically is that we arrived at the river around 11am to an already in progress spinner fall getting started, then wind slowed things down and we had great hatchers most of the rest of the day hoping for spinners to re-appear. All this commenced on an a-typical schedule. Typically up in the Holy Waters and the South one expects to find hatchers at the peak water temp which is about 2-4 pm that time of year.

I suppose the all early / all day hatching can be explained by the warmer temps spilling over from Mio Pond.

I'd love to hear the low down on what the expected daily hatch schedule is down there (for Hennys). It seems a little a-typical but this is based on three data points.

- your's "Gear and Theory"