A cathedral of champion trees in the largest old-growth bottomland forest in the Southeast.
Photo: Miguel.v · CC BY-SA 3.0 · via Wikimedia Commons
Congaree doesn't announce itself with cliffs or peaks — it overwhelms you by looking straight up. This floodplain forest along South Carolina's Congaree River holds the largest intact expanse of old-growth bottomland hardwoods left in the southeastern United States, and one of the tallest deciduous canopies on Earth: an army of champion trees under a canopy averaging over 100 feet, including a national champion loblolly pine measured at 170 feet, towering bald cypress with their knees rising from the dark water, and the highest concentration of champion-sized trees anywhere in North America. Walking in feels like entering a green cathedral.
The way most people see it is the Boardwalk Loop, an easy 2.6-mile elevated walk that carries you over the wet forest floor and among the giants. It was rebuilt over 2025 and reopened in late May 2026, and three-quarters of it now sits above the usual flood line, with a new overlook at the east end of Weston Lake. Beyond that, the tea-colored 'blackwater' of Cedar Creek is one of the South's great quiet paddles, winding through the old growth by canoe or kayak. And for about two weeks each May, Congaree hosts one of North America's rare synchronous-firefly displays, when thousands of fireflies flash in unison after dark — the park runs a lottery-only viewing event on eight of those nights.
Two realities shape any visit, and the park is refreshingly honest about both. It's a floodplain — nearly 80 percent of the park lies inside it, and the river spills over roughly ten times a year, so the low trails and parts of the boardwalk can go underwater and you check conditions before you come. And in the warm months it has mosquitoes, immortalized by the visitor center's tongue-in-cheek 'Mosquito Meter' that climbs from 'All Clear' to 'War Zone.' Come in spring or fall, half an hour from Columbia, and it's free.
There is very little driving at Congaree and it would be dishonest to pretend otherwise. One road in from the highway, a car park, and then a boardwalk — the park is walked and paddled, not driven. What it does have is position: half an hour from Columbia and a few miles off three interstates, which makes it one of the easiest national parks in the country to stop at on the way past.
South-east from Columbia on Bluff Road to the Harry Hampton visitor center — 19 miles and about half an hour. The road ends at the car park and the park begins on foot.
Three interstates pass within about twenty miles, and I-95 within thirty. Congaree is the rare national park you can add to a long drive up or down the eastern seaboard for the cost of an hour.
Farmland and pine, then bottomland hardwood, and then a car park. That is the whole of the driving — everything this park is famous for is on the boardwalk beyond it.
TipCheck the water level before you come. When the Congaree floods the boardwalk goes under, and there is no drive-through alternative to fall back on.
The must-do — a 2.6-mile elevated boardwalk that drops into the old-growth bottomland among cypress, tupelo, and towering pines and oaks.
Insider tipThe 2.6-mile loop was rebuilt and reopened in late May 2026 — three-quarters of it now sits above the average flood line, so it stays walkable in more conditions than it used to, but the remaining low sections still go under in a real flood. Check the day's posted water level and grab the numbered self-guided brochure at the visitor center.
Plan a trip to this spot →The highest concentration of champion-sized trees anywhere in North America — a national champion loblolly pine measured at 170 feet, and bald cypress with knees rising from the wet floor, under a canopy averaging over 100 feet.
Insider tipThe cypress knees and buttressed trunks are densest in the wet sloughs off the low boardwalk — best in soft early-morning light.
Plan a trip to this spot →A tea-colored 'blackwater' creek winding through the interior old growth — the park's signature paddle, by canoe or kayak.
Insider tipGo only when water levels are in range — too low strands you on logs, and flood stage is dangerous. Check the Cedar Creek gauge on the park's conditions page first; flood stage there is about 8 feet.
Plan a trip to this spot →An oxbow lake — a cut-off former river bend — with reliable wildlife: river otters and wading birds along Cedar Creek.
Insider tipThe 4.5-mile Weston Lake loop is the best mid-distance hike for old growth and water views, and the boardwalk rebuild added a new overlook at the lake's east end.
Plan a trip to this spot →One of only a few synchronous-firefly displays in North America — thousands flashing in unison over about two weeks in May, with a ranger-run viewing event on eight of those nights.
Insider tipYou can't just show up: event nights are a Recreation.gov lottery, one entry per household, opening in early April — $1 to enter, $24 for the pass, 145 vehicle passes a night. Gates open at 7:00 p.m. and close to entry at 8:30 p.m.
Plan a trip to this spot →The hub — exhibits, trail brochures, ranger programs, the Boardwalk trailhead, and the famous Mosquito Meter.
Insider tipStart here to check the day's posted water level and mosquito conditions before you head out.
Plan a trip to this spot →Humid subtropical: hot, very humid summers (July and August highs in the low 90s, the wettest months) and mild winters with frost but rare snow. Rain falls year-round. Two realities define a visit: this is a floodplain, so the river can put the low trails and parts of the boardwalk underwater with little notice, and mosquitoes are serious from mid-spring through mid-fall (hence the visitor center's Mosquito Meter). Check the water gauges and favor spring or fall.
One entrance, a short drive southeast of Columbia.
About 30 minutes southeast of Columbia off SC-48 (Bluff Road) near Hopkins. The visitor center is the trailhead for the Boardwalk and the place to check flood and mosquito conditions.
No lodging in the park — two primitive campgrounds, with hotels in Columbia.
About 30 minutes away, the state capital has the full range of hotels and dining — the practical base for a Congaree trip.
Booking tipMost visitors day-trip from Columbia.
Two primitive campgrounds — Longleaf (walk-in, vault toilets, $15 a night) and Bluff (a mile's carry-in, no facilities, $10) — reserved on Recreation.gov, plus free backcountry camping by permit requested at least 72 hours ahead.
Booking tipNeither campground has running water, so fill up at the visitor center on the way in and bring everything else you need.
Is Congaree free?
Yes — there's no entrance fee or pass. Camping is $10–$15 a night and a firefly-event pass is $24 (plus $1 to enter the lottery), but entry and the Boardwalk are free.
Will it be flooded?
Sometimes. Nearly 80% of the park sits in the floodplain and the river spills over roughly ten times a year, so the low trails and the remaining low boardwalk sections can be underwater. The 2026 rebuild lifted three-quarters of the boardwalk above the average flood line, which helps. Check the Cedar Creek and Congaree River gauges on the park's conditions page before you go.
How bad are the mosquitoes?
Bad in season — from mid-spring through mid-fall, worst in the hot, wet summer. Bring repellent, check for ticks, and glance at the visitor center's Mosquito Meter, which runs from 'All Clear' up to 'War Zone.'
How do I see the synchronous fireflies?
The display runs about two weeks in May, and the park opens eight of those nights as a ticketed viewing event — access is by Recreation.gov lottery only, one application per household, awarded for a specific night. The lottery runs for one week in early April (7–14 April in 2026, for nights of 13–20 May): $1 to enter, $24 for the pass, 145 vehicle passes a night. Gates open at 7:00 p.m. and close to entry at 8:30.
Can I paddle Cedar Creek?
Yes — it's the signature activity. Launch at Bannister Bridge or near the visitor center, bring your own boat or rent locally, and go only at safe water levels (the Cedar Creek gauge floods at about 8 feet).
When should I go?
Spring and fall — mild temperatures, fewer mosquitoes, and better odds of a dry boardwalk. Summer means heat, humidity, and the worst bugs; always check conditions before you come.
Pick your vehicle, line up the stops on the way in and out, and carry the whole route in your pocket.
