That is a Brown. The DF&G here in CA, at one time, stocked Tiger Trout out of the Mt. Whitney Fish Hatchery, in Independence, CA in Eastern Sierra waters. That was a long time ago and Tiger Trout (cross between a Brown and a Brookie ) are incapable of breeding.
This is a little Brown that came from an Western Sierra slope tributary not far from LA...really bright red spotting...
PT/TB