It's interesting how many of the responses are in reference to the Satsop River, because my most memorable lost fish was also on the Turnow Branch ( middle fork Satsop) in the early 1970's. That particular winter hosted a terrific run of very large steelhead mid-January to the end of February. I landed a 22# hen mid January, the next weekend my buddy landed a 25#buck. The following weekend, I hooked a steelhead that made the 2 previous fish look small. When I first hooked it, it flashed under the surface and looked like someone turned a full length wardrobe mirror on its side. It immediately jumped and we collectively gasped "Oh my God!". The steelhead was by far the largest that me and my 2 buddies had ever seen, easily 30#. It jumped 2 more times in quick succession. I was standing in waist deep water, and it shot downstream, then actually circled upriver behind me before I could catch up to it on my reel. It then ran to the outside of an upstream rootwad, then shot back downriver. We jumped into the driftboat and rowed upstream to free my line, got it free, then pushed downriver to catch up to the fish. When I caught up to it, it shot back upriver, got around the same rootwad, and broke me off. That was many years ago when catch & release was practiced infrequently, although I personally released a good number. There is no doubt that I would have kept that fish. I have strictly practiced catch and release for the past decade or more, and honestly I'm haunted by the memory of killing that 22# hen. Now that I look back on the monster steelhead that I broke off, in retrospect, I'm glad that I lost it.