Myotis leibii (Eastern Small-footed Myotis) are infrequently encountered across their range, and as a result, little is known about their summer roosting ecology. This species is not federally protected, but receives legal protection in many states, including Tennessee. Additional information on the species, particularly its summer roosting ecology, is needed to inform appropriate management and conservation planning. While conducting a summer survey of multiple bat species using buildings as roosts in Great Smoky Mountains National Park, we discovered Eastern Small-footed Myotis roosting in 3 historic buildings on the northwest slope of Mount LeConte. At least 1 building contained a maternity colony. Humans used all 3 buildings on a daily basis.