If You Want to See Thousands of Fireflies Light Up at Once, Head to the Great Smoky Mountains

A firefly mating ritual turns into a synchronized light show

Great Smoky Mountains Fireflies, Synchronized
Synchronous fireflies put on a show each spring in the Great Smoky Mountains. Photinus carolinus is the only firefly species in the U.S. that flashes in unison. QEYES/iStock

There's never a bad time to visit a national park—it's an unforgettable experience, even during the winter. But from the end of May through the very beginning of June, you can see something incredible unfold at the Great Smoky Mountains National Park: a firefly mating ritual. For two weeks, thousands of Synchronous fireflies descend on a special area of the park near Elkmont to put on quite the synchronized light show. 

Travelers have planned vacations around the event for years, but park officials have enforced a lottery system for obtaining passes to the light show in and effort to protect the bugs. In previous years, passes sold out in seconds online. This year, the park is doling out passes using an online lottery system. The lottery for all 1,800 parking passes will open up at 12pm on Friday, April 28th and will remain open to the public until 8pm on Monday, May 1st. Anyone who received a pass to the park during the mating season will be notified via email on May 10th. While the lottery is free to enter, there will be a $2.75 reservation fee to pay for anyone who receives a ticket—a small price to pay for check on the bucket list.

Synchronous Fireflies

No video could ever do the in-person experience justice, but check out the video above for a taste of what you can expect to see.

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