Mine was in 1996 on the Sol Duc. It was under the first bridge west of the Klahowya campground. I know it was winter because I remember camping in the snow and remember freezing my ass off on the river.
We started fishing that day at daybreak and I caught the fish at last light (I remember telling my bud- last cast). It was a 6-7 lb bright native hen caught drift fishing an aero fly. I thought it was my 500th snag of the day and lifted the rod to pop it free when it shook it's head and ran up river. Man was I stoked. I smiled all the way back to Seattle. My bud was pretty sick of me describing it by the time we got home.
Weird thing is I didn't fish for them again until about 4 years ago.