New Hampshire’s Flume Gorge packs waterfalls, caves, and a mystery boulder into two miles

The gorge a 93-year-old woman’s fishing trip revealed

Somewhere in the White Mountains of New Hampshire, a narrow crack in the earth runs 800 feet through solid granite, and most people drive right past it.

Flume Gorge sits inside Franconia Notch State Park, close to Lincoln, and the walls rise 70 to 90 feet on both sides. In the tightest spots, those walls stand just 12 to 20 feet apart.

The full loop covers only two miles, but it strings together enough wonders to fill a whole day of conversation.

Found by a woman fishing alone at 93

In 1808, a woman everyone called “Aunt” Jess Guernsey went looking for a fishing spot and walked into something no one in the area knew existed. She was 93 years old.

The gorge she found had a massive, egg-shaped boulder wedged between the walls. For decades it hung there.

Then in June 1883, a violent rainstorm sent a landslide crashing through the canyon, and the boulder disappeared. No one ever found it.

That same storm carved deeper into the rock and pushed a new waterfall into existence at the top of the gorge.

A boardwalk takes you straight through the canyon walls

The trail puts you right between the granite on a wooden boardwalk that climbs through the gorge. Walls of Conway granite rise on both sides as you move deeper in.

Below the boards, Flume Brook runs clear over the rock.

Ferns and mosses press out of every crack in the stone, and wildflowers hold on in places that don’t seem to have enough soil to grow anything.

The gorge runs cooler and wetter than the surrounding woods, and the mist thickens as you climb.

Avalanche Falls crashes 45 feet onto the boardwalk

You hear it before the trail bends toward it. Avalanche Falls drops 45 feet at the top of the gorge, and the spray travels well past the edge.

The waterfall didn’t exist before that 1883 storm, which makes it younger than the covered bridge you’ll cross near the start of the walk.

The roar bounces off both walls of granite as you reach the top, and the mist soaks anything you’re not keeping covered. It’s the most photographed spot on the trail, and when you get there, the reason is obvious.

The covered bridge that’s been here since 1886

Near the start of the walk, the bright red Flume Covered Bridge crosses the Pemigewasset River. It went up in 1886, which makes it one of the oldest covered bridges in New Hampshire still standing.

The river’s name comes from the Abenaki language and means “swift or rapid current,” which tells you most of what you need to know about the water below it.

Old covered bridges like this one used to be called “kissing bridges,” named for the shelter they gave travelers who weren’t in a hurry.

Table Rock’s smooth 500-foot slab tells 10,000 years of water

Along Flume Brook, a wide, flat shelf of Conway granite stretches about 500 feet long and 75 feet wide.

The water wore the surface smooth over thousands of years, and the result is a stone platform that opens up the trail just long enough to let you stop and take it all in.

It’s a good spot for photos and a few minutes off your feet. The wet surface gets slippery, so stay on the marked path and keep your footing on the edges.

A 40-foot-deep pool carved out by retreating ice

Down where the trail swings toward the Pemigewasset River, a deep basin sits ringed by cliffs that climb as high as 130 feet.

The Pool formed at the end of the Ice Age, about 14,000 years ago, and the water runs 40 feet deep over a floor of 150 feet across. A small cascade tumbles in over fallen granite at one end.

The cliffs overhead make it feel enclosed, and the water has that cold, deep blue that mountain rivers get when they’ve come a long way.

A bridge built on a 175-foot tree the hurricane knocked down

The Sentinel Pine Bridge crosses high above the Pool, and it doesn’t rest on posts or pilings. It rests on the trunk of a pine tree that once stood 175 feet tall.

The hurricane of September 1938 put that tree on the ground. The next year, workers built the footbridge directly over the fallen trunk and called it done.

Standing on it now, you can look straight down into the Pool below. It’s a short crossing, but you’ll stop in the middle longer than you plan to.

The Wolf Den squeezes you through the boulders on hands and knees

Off the main trail, a one-way path ducks into the Wolf Den, a tight passage through the rocks where you get down and crawl.

You squeeze between boulders, work your way through gaps in the stone, and climb out the far end through a crack just wide enough to fit. Kids love it.

Adults who enjoy a little scramble do too.

It’s optional and easy to skip if the main trail suits you better, but if you’re up for it, the Wolf Den is worth the detour.

Liberty Gorge rewards the few visitors who leave the main path

A short side path off the Ridge section of the loop leads to Liberty Gorge, where a mountain stream drops through a narrow rocky valley. Most people walk past the turnoff without taking it.

The ones who stop find a quieter version of the main gorge, more tucked away, with a cascade working its way through rock on its way down to the Pemigewasset River. Both gorges drain into the same river in the end.

This one just takes a few extra minutes and a little curiosity to reach.

Ice Age boulders the size of houses sit in the middle of the trail

The trail passes through a scattering of massive boulders that stop most walkers cold. Some of them weigh more than 300 tons.

About 25,000 years ago, a sheet of ice a mile thick dragged them across the landscape. When the ice melted, it set them down and moved on.

Geologists call these leftover rocks “glacial erratics,” meaning they don’t belong to the bedrock around them. They were carried from somewhere else and left here, which explains why they look so out of place.

Two miles, 13 wonders, and a walk that earns the drive north

The full loop covers two miles and takes about an hour and a half. The path mixes packed gravel, boardwalks, stairs, and stretches that climb.

Sturdy shoes matter, especially near the falls where the mist settles on every surface.

Along the way you’ll pass waterfalls, cliffs, a boulder field, two covered bridges, a cave you crawl through, and a deep glacial pool. Not many two-mile walks pack that in.

Bring shoes with grip and give yourself a little extra time.

Visit Flume Gorge in Franconia Notch State Park, New Hampshire

Flume Gorge sits inside Franconia Notch State Park off Interstate 93 near Lincoln, New Hampshire. For the 2026 season, the gorge runs from May 8 through Oct. 25, weather permitting.

Book your arrival time online in advance because slots sell out, especially on weekends. The visitor center at the trailhead has restrooms, a gift shop, a cafeteria, and a short film about the park.

Leave your pets at home or in the car, as they aren’t allowed inside the gorge.

This article was created with AI assistance and human editing.

Read more from this brand:

• This New Hampshire mountain pass packs gorges, waterfalls, and a ghost into eight wild miles
• New Hampshire’s tallest falls plunge through granite deep in the White Mountains
• New Hampshire has a crack in the earth 90 feet deep — and you walk right through it