What species

[Coho975]

I was fishing yesterday at a local reservoir, the fishing was hot in the morning, and I landed this fish. My first glance at it looked like a lake trout. Google lens even said the same thing. I know there are no lake trout in the reservoir. My next guess was a splake? 
Please chime in!

I would say that's a laker, fork in the tail is too deep for a splake.  You'd have to open him up to be certain though...