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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.

Dorsal view of a Ephemerella mucronata (Ephemerellidae) Mayfly Nymph from the Yakima River in Washington
This is an interesting one. Following the keys in Merritt R.W., Cummins, K.W., and Berg, M.B. (2019) and Jacobus et al. (2014), it keys clearly to Ephemerella. Jacobus et al provide a key to species, but some of the characteristics are tricky to interpret without illustrations. If I didn't make any mistakes, this one keys to Ephemerella mucronata, which has not previously been reported any closer to here than Montana and Alberta. The main character seems to fit well: "Abdominal terga with prominent, paired, subparallel, spiculate ridges." Several illustrations or descriptions of this holarctic species from the US and Europe seem to match, including the body length, tarsal claws and denticles, labial palp, and gill shapes. These sources include including Richard Allen's original description of this species in North America under the now-defunct name E. moffatae in Allen RK (1977) and the figures in this description of the species in Italy.
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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Tigermidge
Lakewood, Ca.

Posts: 10
Tigermidge on May 4, 2013May 4th, 2013, 4:21 pm EDT
We started out Monday morning at 5 AM and hit Orem about 4 PM. I took Rob to see the Cabala's, if you have never seen it it's worth a stop. Started out for Dutch John at 7 AM.
Got to our room by 12:30 and quick set up, grab the fishing gear and drive to the river.
First Brown in about 20 min. of fishing. You got to love this river.
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And a few more in 4 hours of fishing.
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We Walked the river the next 4 day, there where 25 of us from the LBCC most used drift boats for 2 day and walked 2 days.
I personal would rather walk it is a great river to go exploring in.
The flow was 850, a little low but no big deal and I had a great time finding and catching fish.
water was 41 Deg. they have had a COLD spring this year. The first day of fishing the temp was 45 Deg.
and the last day was 75 Deg. People were very happy to have some warm weather up there.

More fish photo's.
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This is a fun trip and worth the effort to get here.

Mark F.
It's impossible to explain the attraction except to say that steelheading is like golf: viewed objectively , it makes no sense, but some people like it.
DUBBN
DUBBN's profile picture
Colorado

Posts: 47
DUBBN on May 4, 2013May 4th, 2013, 7:52 pm EDT
They really are gorgeous fish in there. I am glad you had fun. Those fish down there are worth getting down on your knees and stretching your arms all the way out. ;-)

What were the hot patterns, if you dont mind sharing?
It's OK to disagree with me. I can not force you to be right.
Tigermidge
Lakewood, Ca.

Posts: 10
Tigermidge on May 4, 2013May 4th, 2013, 9:51 pm EDT
BWO emerges when the hatch happened, and a little white bead wire midge I tie.
It's impossible to explain the attraction except to say that steelheading is like golf: viewed objectively , it makes no sense, but some people like it.
Sayfu
Posts: 560
Sayfu on May 5, 2013May 5th, 2013, 6:06 am EDT
So you walked the "A" section?. or the "B" section? Starting from Dutch John and you drove the road to the lower end of the "A" section, and then walked down into the "B" Section?
Tigermidge
Lakewood, Ca.

Posts: 10
Tigermidge on May 5, 2013May 5th, 2013, 7:45 am EDT
From Little hole (bottom of A section) I walked up 2 day. One with a good dry fly hatch and one not so good. 1 day I walked down from the dam, top of A section. and 1 day I walked down from little hole Start of B section.

Mark F.
It's impossible to explain the attraction except to say that steelheading is like golf: viewed objectively , it makes no sense, but some people like it.
Kschaefer3
Kschaefer3's profile picture
St. Paul, MN

Posts: 376
Kschaefer3 on May 6, 2013May 6th, 2013, 4:52 am EDT
Thanks for the report. Great pictures, great fish.
Fishermans
uk

Posts: 2
Fishermans on May 7, 2013May 7th, 2013, 3:58 am EDT
Fanastic pictures there guys.
A bad days fishing is better than a good day at work!
http://www.rainbowtroutrecipes.net

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