Great Smoky Mountains Fireflies 2025 Dates. This week, the park announced its plan to welcome visitors to see thousands of fireflies flash in unison with a limited viewing event scheduled to take place at elkmont from monday, june 3 through monday, june 10. Synchronous fireflies in great smoky mountains june 2025.
Friday, april 26 at 10 am edt: On cool nights (below 50ยบ fahrenheit) and.