You seem to be shrinking. You’re hiking through dense Northern California greenery, passing from a dirt path to an elevated walkway. And the trees are getting taller.

Somewhere nearby, a bird calls and Mill Creek burbles. But those elements are only bit players in this drama. The main attractions rise up around you in daunting clusters: redwoods, implausibly tall, imponderably old and, until recently, a secret.

This is the Grove of Titans, a roughly 3-acre patch of parkland near the California-Oregon border that holds some of the planet’s tallest trees. To enter, you step on to the three-mile Mill Creek Trail, newly rerouted and ready for summer visitors. For a writer from Southern California, this place isn’t just wetter. It seems to operate on different principles of time and size, too.

This is not the only spellbinding redwoods hike in the rainforests of Del Norte and Humboldt counties, or even the only redwood trail in Jedediah Smith Redwood State Park, but it has a story like no other.

In mid-June, I walked the trail with Erin Gates, acting deputy superintendent of Redwood National and State Parks, to talk about the grove’s odd history and the challenge it poses to hikers and rangers.

“This forest is different from the redwood forests in Big Sur or Santa Cruz. Everything is more magnified. The ferns are bigger. The trees feel bigger. It feels like you’re in prehistoric times. Look at how many shades of green you’re seeing, just standing here,” she said.

Many of the trees rise more than 300 feet from the damp, uneven ground. Sometimes three or four trunks spread and rise from a single base. Some trunks sprout straight up from the sides of trees that fell long ago. I paused at one tree with blackened bark.

“This looks recent,” I said.

No, said Gates. That fire happened more than 170 years ago.

Rangers say many of these trees are more than 1,300 years old. Some may be more than 2,000.

“It’s so green!” said Kate Melbye, 16, visiting from Wisconsin, as she passed on the trail.

“The banana slugs!” said her sister, Ally Melbye, 11. (They’re yellow, several inches long, and they come out after rain, which is often.)

These woods have been part of Jedediah Smith Redwoods State Park since the park’s creation in 1929, and part of Redwood National and State Parks since 1994. Yet this grove — three acres in a 10,000-acre park — was unknown to experts until 1998.

That’s when rainforest-roaming redwood experts Stephen C. Sillett, a professor at Humboldt State University, and Michael W. Taylor found it, chose the name Grove of Titans and bestowed equally portentous names upon the largest of the trees. Screaming Titans. Lost Monarch. El Viejo del Norte.

When author Richard Preston described the men’s discovery in his widely acclaimed book “The Wild Trees” in 2007, he didn’t disclose the grove’s specific location for fear of the damage that might follow. Rangers kept the secret, too, thinking of the redwoods’ shallow, vulnerable roots and the grove’s “understory” foliage.

“We would basically pretend like it didn’t exist,” Gates said. Even now, the most recent park brochures say nothing about the Grove of Titans.

But the internet says plenty.

About 11 years ago, someone posted the grove’s GPS coordinates. Soon rangers were finding a warren of “social trails” — bushwhacked by tree seekers — in the area. Still the rangers kept mum (just as they keep mum about the location of Hyperion, the tallest known tree on Earth), hoping the traffic would fade away. Instead it grew.

“We saw almost irreparable damage happening to some of the forest floor in less than a decade,” Gates said.

This put the rangers in a tough spot. They’re supposed to provide access to public lands, but they’re also supposed to protect old-growth forests that have already been 95% destroyed by logging.

As for the letter of the law, in most cases, it’s not illegal to hike off trail in a California state park, but “disturbance or destruction” of natural scenery, plants and animal life “is strictly forbidden.”

The park officials’ answer: Reroute an old trail to run through the grove — and to build a quarter-mile elevated metal walkway that protects the most vulnerable forest floor from footprints while allowing sunlight and moisture in. This way, hikers need not blaze their own ­forest-damaging pathways. If people stay on the new trail, everybody wins.

A crew began work on Mill Creek Trail in late 2019, taking elaborate steps to protect the forest while they built.

“They ended up hand-­carrying over 128 tons of material,” Gates said.

The trail’s elevated portion, which begins about three-quarters of a mile beyond the Mill Creek trailhead, was completed in September 2021, along with a set of restrooms. The next 2 miles of the 3-mile rerouted trail — now wider, with footbridges, retaining walls and reminders to stay on trail — is due for completion in midsummer.

New signs explain the ecosystem and acknowledge that the area is part of the ancestral lands of the Tolowa Dee-ni’ Nation. The Save the Redwoods League and Redwood Parks Conservancy contributed much of the project’s $4 million cost.

Gates said the trail crew will probably apply finishing touches by the end of July. But the reviews from hikers are coming in already.

“My necks hurts from looking up,” said David Ogden, 27, from Ohio, beaming.

“Breathtaking,” said Kolton Wilson, 30, also of Ohio.

Mill Creek Trail and Grove of Titans require no reservations, and they’re free. In May, rangers counted 380 cars per day traveling on Howland Hill Road toward the grove from Crescent City.

Besides the redwoods, visitors find enough species to populate a botanist’s fever dream, including big leaf maple trees, Douglas fir, western hemlock, grand fir, California bay and Sitka spruce trees, with sword ferns, trillium, azaleas and orchids below.

Besides banana slugs, black bears, Roosevelt elk and rough-skinned newts pass through, though we didn’t encounter any on this day. (The next day, we came across more than a dozen lounging elk in Prairie Creek Redwoods State Park.)

The professional trailblazers clearly had fun re-threading the Mill Creek Trail around and between the behemoths. Here and there, you walk under fallen trunks. At one point you enter a dark tunnel of foliage beside a toppled tall tree, then emerge again, buffeted by fern fronds.

Still, on the path, I couldn’t help wondering: What if people follow this revised trail into the grove, then hop off path to hug more trees and pose for more selfies?

It’s already happening, Gates told me.

“We built this to allow people to get close, and we can see where it’s growing back, the ferns and the sorrel. But you can see where they are not growing back. People are trampling again.”

In a separate conversation, Gates added that most people “are not doing this out of malice. It’s done out of ignorance. They’re thinking on an individual level rather than a collective level.”

To tamp down that behavior, park officials are recruiting “Titaneers” — volunteers who will walk the trail with radios (and uniforms from REI). And they may add more signs asking people to stay on the trail.

“But do you over-sign a place like this?” Gates asked, spreading her arms to indicate the vast canopy.

If you get to the Grove of Titans this summer, you’ll be doing yourself a favor. If you stay on trail, the rangers say, you may be doing one for your kids’ kids.

Other attractions

Don’t miss Crescent City’s Battery Point Lighthouse, which stands on a tidal island, dates to 1856 and survived the great tsunami of 1964. It’s a handsome building along a gorgeous stretch of coastline. If you get to the parking lot at Battery and B streets at low tide, you can walk to the lighthouse. Just be sure to return before the water rises and surrounds the island again. Tide permitting, it’s open daily 10 a.m. to 4 p.m. April through September.

To spend time on the ­water and hear a native ­perspective on the area, head for Klamath (22 miles south of Crescent City and 48 miles north of the Arcata/Eureka airport), where Yurok tribe guides ­offers summertime tours on the Klamath River in traditional redwood canoes (two hours or four hours). Two-hour jet boat tours are also available.