Fishfly Larva in the snow in Washington

Subject:  What is this?
Geographic location of the bug:  West slope of the Cascades, Washington.  Ele 2000 ft
Date: 03/25/2018
Time: 01:35 PM EDT
Your letter to the bugman:  Saw this walking on the snow.  Some kind of wood eater?  There is natural hot springs in the area.
How you want your letter signed:  Dylan Rhys

Fishfly Larva

Dear Dylan,
Because the critter in your image looks so similar to a Hellgrammite, we are concluding that it is a nymph in the same family, and that it is most likely the nymph of a Fishfly.  Unfortunately, there is not much visual documentation of the larvae of western species.  What excites us most about your submission is that we can tag your posting as a Snow Bug.

Fishfly Larva

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