The Tennessee dude got me thinking so i found this looking on the web.
Turns out we have several places in Texas that have several heards of elk free ranging.....Cool
Distribution in Texas. Formerly present only in the Guadalupe Mountains (Culberson County) but presently, free-ranging elk exist in Texas in five herds in the Guadalupe Mountains, Glass Mountains (Brewster County), Wylie Mountains (Culberson County), Davis Mountains (Jeff Davis County), and Eagle Mountains (Hudspeth County). Total statewide population in 1984 was estimated to be 1,600. Current populations are between 2500 - 3000.