This one pretty clearly keys to Kogotus, but it also looks fairly different from specimens I caught in the same creek about a month later in the year. With only one species of the genus known in Washington, I'm not sure about the answer to this ID.
The RS2 or Ray’s Semblance 2 is, in my humble opinion, one of the best fishing flies ever designed. If you haven’t fished with the RS 2, you don’t know what you have been missing. RS2 fly
Roguerat on Jan 7, 2021January 7th, 2021, 6:38 am EST
I've tied and fished the RS2, or Rim's Semblance, and its a good fly...I'd agree IMHO that Rim Chung is a great tyer and his patterns are well worth trying.
Anyway, a late Happy New Year to all, and sadly I haven't been on the water since October? something due to lots of requests and patient clients in my woodworking side-job; I'm sort of retired but not so much lately.