Dear Edouard, 

You can use the link of an international project http://www.fishbase.org and check the genus for example Salmo and you will receive some results about map location and other characteristics:

http://www.fishbase.org/Nomenclature/ScientificNameSearchList.php?

Good luck!

Regards, 

Romina

The following monograph provides detailed distribution maps of Alaskan freshwater fishes, including the ichthyofauna of Kanektok River:

McPhail, J. D. & Lindsey, C. C. 1970. Freshwater fishes of northwestern Canada and Alaska. Bulletin of the Fisheries Research Board of Canada 173: 1-381, map, frontispiece.

Here is another one with generalised distribution maps:

Morrow, J. E. 1980. The freshwater fishes of Alaska. Anchorage i-xv + 1-248, pls. 1-30.