Congaree National Park protects the largest contiguous tract of old-growth bottomland hardwood forest in the southeastern US. It’s free to enter, easy to fit in a day, and famously easy to underestimate. The famous “mosquito meter” at the visitor center is real, and the rating you see when you walk in shapes what kind of day you’re going to have.
A one-day visit hits the Boardwalk Loop, maybe a paddle on Cedar Creek if time and water levels allow, and a short break at the visitor center. Late spring brings the synchronous fireflies and a separate lottery requirement.
Before you go
- Entrance fee: free. Congaree has no entrance fee
- Drive from Columbia, SC: about 20 minutes
- Best season: October through April for fewer mosquitoes; late May to mid-June for synchronous fireflies (lottery required)
- Worst season: July to September, when humidity is brutal and the mosquito meter reading often hits “war zone” or “ruthless”
- Cell service: limited inside the park; download maps before arriving
- Harry Hampton Visitor Center: the orientation hub; open seven days a week with reduced winter hours
- National Park since 2003 (was a National Monument before)
About the mosquito meter
The mosquito meter is a physical sign in the breezeway outside Harry Hampton Visitor Center, ranging from 1 (mild) to 6 (war zone). Rangers update the rating by hand based on conditions. It’s not an online dashboard; checking it requires being on-site. The reading shifts dramatically with rain, temperature, and time of day, so a morning visit can feel completely different from an afternoon one.
Pack DEET- or picaridin-based bug spray regardless of forecast, and lightweight long sleeves are smart even in summer.
Synchronous fireflies (May to June)
Congaree is one of the few places in the world where synchronous fireflies put on a coordinated light display. The 2026 event ran May 13 through May 20. Important rules:
- Event access is LOTTERY only via recreation.gov; lottery applications typically close in early April
- During event nights, day-use is restricted: trails and the boardwalk close at 4:30 pm to non-permit holders
- If you don’t have a permit during the firefly event, plan a different day to visit
- Headlamps and white lights are prohibited during the event to preserve the firefly display
A one-day plan
| Time | Stop | Why it works |
|---|---|---|
| 8:30 to 9:30 am | Harry Hampton Visitor Center, check the mosquito meter | Maps, ranger info, current trail conditions |
| 9:30 am to 12:30 pm | Boardwalk Loop (2.6-mile elevated boardwalk) | The signature accessible trail through old-growth forest |
| 12:30 to 1:30 pm | Picnic at the visitor center or lunch in nearby Hopkins/Columbia | No food service in the park |
| 1:30 to 4:30 pm | Cedar Creek paddle OR Weston Lake Loop Trail (4.5 mi RT) | Paddle if you have a boat and water levels allow; Weston Lake if not |
| 4:30 to 5:30 pm | Bluff Trail or Sims Trail walk | Quieter, shorter trail options before leaving |
The Boardwalk Loop
The Boardwalk Loop is the headline experience: 2.6 miles of elevated boardwalk through the old-growth floodplain. The boardwalk allows access even when the floodplain is wet (which is often). Highlights along the way:
- Some of the tallest trees in the eastern US, including 130+ ft loblolly pines and old-growth bald cypress
- Wesley Lake oxbow on the southern half
- The Boardwalk Loop self-guided brochure (free at the visitor center) explains numbered stops along the way
- Mosquito-free during cool, dry mornings; very different after rain
Verify the boardwalk is open before driving over; rare flood events can close sections.
Cedar Creek paddling
Cedar Creek is a 15-mile self-guided canoe trail from Bannister’s Bridge to the Congaree River. Most paddlers do shorter out-and-back sections from the Bannister’s Bridge launch. Notes:
- Bring your own boat or rent from outfitters in Columbia; the park has no rentals
- Water levels swing widely; the park’s website posts current conditions
- Trail markers are limited; GPS or a paddler-specific guide is recommended
- Allow at least 4 to 6 hours for a meaningful section
Pairing with nearby Southeast parks
- Great Smoky Mountains National Park — about 4 hours northwest, the busiest national park in the US
- Hot Springs National Park — about 9 hours west in Arkansas; another quieter Southeast NP
- New River Gorge National Park — about 6 hours north in West Virginia
Frequently asked questions
How much does Congaree cost to enter?
Nothing. Congaree has no entrance fee. The visitor center, trails, boardwalk, and ranger programs are all free. Costs only show up if you rent a canoe or kayak from a Columbia outfitter for Cedar Creek.
When are the synchronous fireflies?
Mid-May to mid-June, with peak typically lasting 7 to 10 nights. The 2026 event ran May 13 through May 20. Access during the event is lottery only through recreation.gov; lottery applications close in early April. If you don’t have a firefly permit, the boardwalk and trails close at 4:30 pm on event nights.
What’s the mosquito meter?
A physical sign at Harry Hampton Visitor Center rating mosquito intensity from 1 to 6. Rangers update it manually. There’s no online version; the only way to check is to drive over. The meter is a Congaree institution and a real planning tool, especially in summer.
Is one day enough?
Yes. The Boardwalk Loop plus a shorter side trail covers the basics. Add a paddle on Cedar Creek if you have your own boat. Most visitors don’t need two days unless they’re doing a long paddle or staying for the fireflies.
When should I avoid visiting?
July through early September. Heat, humidity, and mosquitoes peak together; the mosquito meter often reads 5 or 6 during this stretch. If summer is the only option, plan for an early morning visit and bring serious bug protection.
