>>1916078They exist in literally every state. The difference is mixed forests in the east are at sea level upward and require more moisture and more widespread, while mixed forests out west are usually higher than 4,000ft except in riparian areas where they occur lower and can handle droughts.
>>1915896The entire east from Arkansas/Missouri/Minnesota eastward. Most of the forested far north, and riparian and middle/high elevations in every state out west even in "desert" states.