When trying to identify this fish, understand that its tail is obviously beat-up.
Department of IF&W.
The most obvious difference between salmon and brown trout may be found in the head and tail areas. Knowing them may help the angler release a fish more quickly when certain creel and size restrictions apply. On salmon, the vomerine teeth are small and arranged in single row on shaft, few to none on vomerine head. On the Brown Trout, the vomerine teeth are well-developed on both vomerine head and shaft, arranged in a zig-zag row on shaft. On salmon, the caudal fin may be slightly forked and on the brown trout, the caudal fin is square and unforked.
Usually coloration is light brown or tawny with pronounced black spots on the back, sides, and head. Spots are often surrounded with a redish halo, along redish spots on the sides. Color is highly variable, and browns are occasionally confused with landlocked salmon.
Myself and my fishing buddy believe this to be a brown trout notice the red spots and yellow coloration. But it seems that many folks think it could be either a salmon or brown. This is from Lake St. George.
If you do believe this to be a salmon, please post a reply with photo of a male salmon with similar coloration.
Thanks