I've read that coastal cutthroat evolved to spawn and spend a portion of their life cycle in smaller creeks and tributaries to avoid competition from larger anadromous salmonid species. That suggests to me that the smaller size is due to genetics. They've also been documented spawning with steelhead so there are a few hybrids around. Somewhere in the bowels of my computer, I have a digital copy of a Master's Thesis from a Humboldt State student that documented these hybrids in tributaries feeding some of the coastal lagoons along the Northern California coast.
Several years ago while fishing for SRC in CA's Smith River estuary, I stopped and asked permission from a dairy farmer to access the upper tidewater adjacent to his property. We chatted awhile and when he found out what I was fishing for, he waved over his milker who showed me a photo of a 24 inch long coastal cutthroat which was caught at Lake Earl, a large coastal lagoon just south of the Smith.
Many years ago, I had a conversation with one of my staff at Lake Earl Wildlife Area. He showed me a photo of what he said was a 5 lb coastal cutt he had caught at Lake Earl. He claimed large cutthroats were (and still are) common there. Lake Earl typically breaches every winter so these fish have access to the ocean - but usually during the winter and early spring months. I'm with Brian, skyriver and others, those big fish are out there.
Several years ago while fishing for SRC in CA's Smith River estuary, I stopped and asked permission from a dairy farmer to access the upper tidewater adjacent to his property. We chatted awhile and when he found out what I was fishing for, he waved over his milker who showed me a photo of a 24 inch long coastal cutthroat which was caught at Lake Earl, a large coastal lagoon just south of the Smith.
Many years ago, I had a conversation with one of my staff at Lake Earl Wildlife Area. He showed me a photo of what he said was a 5 lb coastal cutt he had caught at Lake Earl. He claimed large cutthroats were (and still are) common there. Lake Earl typically breaches every winter so these fish have access to the ocean - but usually during the winter and early spring months. I'm with Brian, skyriver and others, those big fish are out there.












