You might have spotted grizzlies in Yellowstone or stood at the rim of the Grand Canyon, but near endless outdoor adventures await in America’s national parks. From a watery wonderland in Minnesota to labyrinthine caves in Kentucky, we celebrate 10 of the most underrated national parks across the States, perfect for those seeking the road less travelled.
1. Mammoth Cave National Park, Kentucky
It’s easy to see how this western Kentucky park got its name. It’s home to the longest cave system in the world, stretching out for almost 700km underground.
It’s thought these caves were first discovered by humans around 4,000 years ago. Now visitors can take a tour, led by informative park rangers, to learn about the history of the complex labyrinths and giant chambers.
For those who’d rather remain overground, the park is also home to two rivers: the Green River and the Nolin River. Hike alongside these waterways and listen out for the calls and colours of the park’s extraordinary birdlife, such as the cerulean warbler and the eastern bluebird.
2. White Sands National Park, New Mexico
More than 250 million years ago, Tularosa Basin in New Mexico, near the city of Alamogordo, was covered by a shallow sea. Now, the rare gypsum sand that once lay at the bottom of that body of water is the only thing that remains. It creates these glittering white mounds, which still change at a rate of up to nine metres per year.
During the summer, temperatures have been known to rise to a sweltering 40ºC. Miss the midday sun and take a sunset tour with local rangers to explore this beautiful and rare 700 sq km white desert.
3. North Cascades National Park, Washington State
North Cascades is among the USA’s least visited national parks. Only around 161km from Seattle, it really is one of the country’s best kept secrets, with some 2,040 sq km of natural beauty including mountains, lakes and more than 300 glaciers.
There are many ways to explore the park. Travellers can enjoy boating, horseback riding, camping and of course hiking, with the forested Thunder Creek trail being one of the best-known routes.
Much of the park is virtually untouched, with the highest elevations inaccessible. However, visitors can still discover the wild on more than 644km of trails.
4. Mesa Verde National Park, Colorado
Beyond its natural landscape of red canyons and shrub-dotted mesas, Mesa Verde is best known for being a cradle of Indigenous heritage.
This is thanks to its archaeological sites, with more than 4,000 dotted across the protected area. The cliff dwellings and masonry towers provide well-preserved evidence of the Ancestral Pueblo population, who settled in southwest Colorado for more than 700 years.
The best way to take a glimpse into the past is by joining an educational tour of the ruins. There are also many hiking routes around the park, offering exceptional views of the landscape and a chance to spot wildlife, including herds of wild horses.
5. Voyageurs National Park, Minnesota
Teetering on the Canadian border, Minnesota’s only national park is made up of four large lakes and 26 smaller lakes and covered by northern hardwood and southern boreal forest, a habitat for more than 150 wildlife species including otters, eagles and wolves.
You can have year-round adventures in Voyageurs National Park. Summer is peak season, with visitors coming to kayak, paddleboard, boat or swim in the lakes. Autumn sees the landscape dressed in dazzling shades of ochre, making it picturesque hiking territory. Meanwhile, winter sees far fewer visitors, yet just as many fun-filled activities ranging from snowshoeing to snowmobiling. Time it right and you could even catch a northern lights show…
6. Channel Islands National Park, California
California is renowned for its national parks, with the Golden State being home to more than any other state (nine in total). But while the crowds head to Yosemite and Joshua Tree, we suggest setting your sights on the coast for some ocean-based adventures.
Known for its incredible biodiversity, Channel Islands National Park is California’s answer to the Galapagos Islands. Located off the state’s southern shoreline, it consists of five isles: Anacapa, Santa Barbara, Santa Cruz, San Miguel and Santa Rosa.
A top spot for a day trip is Anacapa, known for its excellent bird-watching and rugged coastal hikes. The island’s caves and kelp forests mean it’s also great for snorkelling. Meanwhile, kayakers should head to Santa Cruz, with its accessible launch points and crystal-clear waters.
7. Great Basin National Park, Nevada
One of mainland USA’s most remote national parks, Great Basin in eastern Nevada is worth the journey. Located near the Utah border, it’s characterised by the rugged South Snake mountain range, which rise from the heart of the park and have been formed over more than 50 million years.
The most popular activity in Great Basin is driving the 20km Wheeler Peak Scenic Drive. The road begins with desert plains before winding up into the mountains, rising to an elevation of 1,200m. Visitors can stop and admire viewpoints from the road, including Mather Overlook and Wheeler Peak Overlook, or jump off onto one of the park’s hiking trails that lead to alpine lakes and ancient Bristlecone pine groves. Don’t miss the enchanting Lehman Caves before you leave – one of the park’s best kept secrets.
8. Gates of the Arctic National Park, Alaska
The remote Gates of the Arctic National Park, located north of the Arctic Circle, is the least visited of all the USA’s national parks, seeing just above 11,000 visitors in 2023. With no roads, Gates of the Arctic is most commonly reached by air from Fairbanks, more than 300km away. The national park encompasses the Brooks Range mountains, glacial valleys, rivers and lakes – an idyllic landscape for intrepid travellers.
The best time to visit is between May to September, for activities such as hiking, rafting and also spotting wildlife such as moose, bears and caribou. Despite its extreme climate, Gates of the Arctic has been home to Indigenous communities for more than 13,000 years. Arrange a guided tour to visit the village of Anaktuvuk Pass and learn about the Iñupiat (Nunamiut) people who live here.
9. Dry Tortugas National Park, Florida
Lying 113 kmkm away from Key West in the Gulf of Mexico, Dry Tortugas National Park is only accessible via seaplane or boat.
Garden Key is one of seven islands that make up the national park, and is home to Fort Jefferson. Constructed in the mid-1800s from 16 million bricks, the masonry protected an important deepwater anchorage in North America. Visitors today can take a guided or self-guided tour of the fort to learn more about its history.
Snorkelling is another must-do activity around the coral reefs of Garden Key and also Loggerhead Key. Loggerhead is Dry Tortugas’ largest island and named after its population of loggerhead turtles that can often be sighted swimming around the island and nesting on its sandy beaches. Divers can also explore the Windjammer Wreck off the island, a shipwreck that met its fate more than a century ago.
10. Hot Springs National Park, Arkansas
While the name ‘Hot Springs’ might bring to mind wonders like Yellowstone’s geysers, Arkansas’ Hot Springs National Park is less about wild attractions and more about rich cultural history.
Permanent settlers arrived in the town of Hot Springs in the early 1800s, and soon it was established as a health and wellness resort. From the late-19th to early-20th centuries, its photogenic neo-classical bathhouses along Bathhouse Row were constructed. Buckstaff Baths remains in use today, with thermal water soaking and other spa facilities on offer for visitors.
Although there’s nowhere to bathe in hot springs outdoors, you can still escape into nature in the national park. Sunset Trail takes you away from the urban centre and into the mountains. Alternatively, walk the Tufa Terrace Trail to see the park’s most impressive-looking natural hot spring, Hot Water Cascade.
Top tip: Be sure to book your National Park pass in advance to guarantee access, especially during summer (peak season).