I would agree.
Quillback I have 13 years experience in OR and there are browns there also. I just think it is intetesting how they often slide under the radar. I discussed a largemouth invasion in an impound with a biologist that had declared them a disaster to the native fish in his lake. The fish had come from another lake upstream and taken a hold in his lake. His natives consisted of kokanee, browns, brookies and rainbows, the only true natives. The discussion wasn't making him happy and when I arrogantly pointed out that his browns weren't even native to the continent he hung up on me. :lol:
Many of the exotics in OR, atlantics and brookies at least, are in formally sterile mountain lakes and have little chance to expand there range.
They already have access and if they liked it they would be there.