State of the Trout 2015 – Trout Unlimited
This report details the status and trends within 28 separate species and subspecies of trout and char that are native to the U.S. Trout naturally occur in 38 of the 50 United States. Of 28 native trout species and subspecies, three are extinct and six are listed as Threatened or Endangered. Excluding the extinct trout, 52 percent (13 of 25) occupy less than 25 percent of their historical habitat and are at high risk from at least one major threat. All native trout face some level of risk. Click here for the full study.