Pa Firefly Festival 2025. Event in marienville, pa by pa firefly festival on friday, june 28 2025 with 7.3k people interested and 79 people going. The 12th annual pa firefly festival nights will be friday, june 28 and saturday, june 29.
The pa firefly festival inc. Every year, fireflies — including synchronous ones — are the stars of the pennsylvania firefly festival in forest county, drawing both firefly fans and researchers.