Yesterday I discovered a new ranger dispatch repeater for the Great Smoky Mountain National Park of 169.725 MHz (P25 exclusive). The park has very recently changed over to their new P25 system.
Other P25 frequencies include: 167.150, 169.0875, 169.550, 170.5125, 171.1625 MHz.
Unit numbers heard include: 400/502/700/710.