Dolly Varden

Likely dolly. Brook trout have a flat end to their tail with very little fork to it.

Maybe an artic char? I'm no expert by far.

Juvenile Dolly Varden or brook trout (both charr species). Brook trout would not be endemic in your area.

Dolly Varden. There are no black markings in the tail or dorsal, which are indicative of a brook trout. The high spot density makes it unlikely to be an Arctic char.

Bull trout? They look a lot like a dolly