RoadTrip to see the synchronous fireflies at Congaree National Park

The synchronous fireflies at Congaree National Park.

Photo by @columbiasc + @_flashnick

Table of Contents

Hey, GVL. 👋 We’ve got a road trip rec for you today – heading down to Congaree National Park to witness synchronous fireflies. ✨

You may not believe your eyes, but thousands of fireflies have been lighting up Congaree National Park (CNP). Not the baseball players in Columbia, mind you, but the actual lightning bugs.

Mid-May officially marked the beginning of synchronous firefly season (even Garden and Gun wrote about it), and CNP celebrates with their annual Fireflies Festival, which began May 10 and lasts through Monday, May 27. So there’s still a few days left to make the trip.

These fireflies are pretty special. In fact, only three out of 2,000 species of fireflies experience synchronous flashing. And we’re lucky enough to have one of them in our own backyard. Synchronous flashing is a part of the fireflies’ matingand each individual firefly has a flash pattern that helps them find their mate.

Since CNP is one of only a half dozen places you can see these fireflies worldwide, the park is expecting a lot of visitors. We know you’re ready to hop in the car to see experience the ‘flies, but to help you make a game plan, here’s a list of everything you need to know before heading out to Congaree:


  • The actual date they will be out is unknown, but it’s estimated to be between May 10-27. We recommend that you keep an eye on Congaree’s website as the dates get closer to know the exact time to go.
  • The best time to see the flashing is between 9-10 p.m. and the best spots should be near the water.
  • The park will have a new, one-way Fireflies Trail for visitors to access the best viewing areas. It’ll start at the picnic shelter + end at the visitor’s center.
  • Parking will be limited, so carpool if you can. If you want to skip the hassle, The COMET is shuttling people to the park from the S.C. State Fairgrounds 7:30-10:30 p.m. May 24-27– for $2 each way or $4 for rides throughout the whole day.

Viewing etiquette is also important because the park wants to make sure the fireflies – as well as the people – have the best experience. Here are a few things to keep in mind:

  • Use your inside voices.
  • No catching the fireflies (or the other creatures you might see).
  • Try to avoid using flashlights (without a red lens) + flash photography. Bright lights can make the fireflies’ blinks stop syncing. CNP provides red cellophane paper + rubber bands.
  • Wear closed-toe, soft-soled shoes, long pants + a long-sleeved shirt.
  • Put on bug spray before you enter the park, not after.
  • Be sure to check Congaree’s list of prohibited items before you go.

#ProTip for next year: The synchronous fireflies can also be seen at Smoky Mountains National Park. The park organizes a lottery for vehicle passes to park at the Visitors Center + take buses to the beautiful viewing area. The lottery opens in April, so go ahead and make your calendar for next year.

Quiz

Keep an eye out for tomorrow’s newsletter for the correct answer.

More from GVLtoday
Sponsored
A local nonprofit gives new life to old pianos by teaming up with local artists across Greenville.
Greenville’s Design Review Board approved plans for a mixed-use development on the site of the former Municipal Court Building and the former American Legion building.
Here are 10 must-do activities for your Greenville spring bucket list that are unique to the Upstate and the spring season.
We’re putting our city’s vibrant ecosystem front-and-center in this new series.
Sponsored
Greenville is full of special places to stay that offer guests a break from traditional motels and hotels.
From upgraded suites to all-new menus around the ballpark, 2026 is all about celebrating the Upstate’s “Home Team.”
The road to the Final Four could start in Greenville, either for the Furman Paladins looking to shine their glass slippers or one of the teams starting the NCAA Tournament here for rounds one and two.
Grab a blanket and settle in to see these artists at local outdoor venues in Greenville.