I just looked at the Idaho Fish and Game Dept. homepage. In some of their tech reports (as well as fishing reports) they seem to refer to the large rainbows of Lake Coeur d'Alene as rainbows or Kamloops interchangeably. Interestingly enough the official list of Idaho record fish features a 37-lb. "Kamloops" from Lake Coeur d'Alene in 1947 and a 19-lb. "rainbow" from Hayden Lake, also in 1947 (as well as a 24-lb. cutt/rainbow hybrid from Coeur d'Alene in 1991). As I said above (and I wish I could find my reference), I believe that the "Gerrard" rainbow is one of several strains of trout derived from lakes in the Kamloops region (in this case, Gerrard Lake). I don't think that the Kamloops has ever even been granted subspecies status. Haig-Brown pointed out in A River Never Sleeps that the only way in which the Kamloops, or interior, rainbow differed morphologically from the coastal rainbow or even the steelhead was in a slightly higher lateral line scale count, and even that difference disappeared when the young were reared at a slightly higher temperature.
