The national park system has 63 parks. Most people visit the same six.
That leaves 57 parks — many of them extraordinary — sitting largely undiscovered. No hour-long lines at the entrance. No packed trailheads. No scramble for parking. Just remarkable landscapes, real wilderness, and the kind of experience that's become increasingly hard to find at the famous parks.
These five deserve far more attention than they get.
1. Isle Royale National Park, Michigan
Why Nobody Knows About It: Isle Royale is an island in the middle of Lake Superior — accessible only by ferry or floatplane, with no roads connecting it to the mainland. That barrier keeps most visitors away, which is precisely what makes it so special. The island receives fewer visitors in an entire year than Yellowstone gets in a single day.
What Makes It Extraordinary: Isle Royale is one of the finest wilderness backpacking destinations in the eastern United States — 165 miles of trails through boreal forest, past pristine inland lakes, and along rugged Lake Superior shoreline. The island has one of the longest-running predator-prey studies in the world, tracking the relationship between wolves and moose since 1958. Moose are commonly spotted on the trails, often at close range. The fishing is exceptional. The solitude is complete.
What to Do: Take the ferry from Copper Harbor or Houghton in Michigan, or from Grand Portage in Minnesota. Day visitors can explore the area around Rock Harbor. Backpackers can take the Greenstone Ridge Trail across the length of the island — one of the finest multi-day hikes in the Midwest. Kayaking the island's coastline is outstanding.
Pro Tip: Isle Royale is only accessible from mid-April through October — the park closes entirely in winter. Book ferry tickets well in advance as capacity is limited. Bring everything you need — supplies on the island are extremely limited.
2. Dry Tortugas National Park, Florida
Why Nobody Knows About It: Dry Tortugas sits 70 miles west of Key West in the Gulf of Mexico — accessible only by ferry or seaplane. The remoteness filters out all but the most determined visitors, leaving behind an extraordinary place that most Americans have never heard of despite it being one of the most spectacular national parks in the country.
What Makes It Extraordinary: The centerpiece of the park is Fort Jefferson — a massive 19th-century military fortress built on a tiny coral island in the middle of the Gulf. The waters surrounding it hold some of the most pristine coral reef in Florida, with excellent snorkeling accessible directly from the beach. The clarity of the water, the color of the surrounding sea, and the surreal sight of a Civil War-era fort rising from the ocean make Dry Tortugas unlike anything else in the national park system.
What to Do: Take the Yankee Freedom ferry from Key West — the journey itself is part of the experience, passing through the backcountry of the Florida Keys. Snorkel the reef around the fort, where visibility can reach 80 feet on a calm day. Tour the fort's interior. Camp overnight on the island for a sunset and sunrise that most visitors never see.
Pro Tip: Book the ferry well in advance — it sells out, especially on weekends and in spring. The only camping is primitive tent camping; bring everything including water. May is an excellent month — water clarity is good and the summer heat has not yet reached its peak.
3. North Cascades National Park, Washington
Why Nobody Knows About It: North Cascades sits in the remote northern corner of Washington, overshadowed by the more famous Olympic and Mount Rainier national parks to the south. It receives fewer visitors than almost any other national park in the contiguous United States — despite containing some of the most dramatic mountain scenery in North America.
What Makes It Extraordinary: North Cascades holds more glaciers than any other range in the contiguous United States — over 300 of them, carving through jagged peaks that rise steeply from deep river valleys. The North Cascades Highway, which runs through the park, is one of the most spectacular drives in the country and is typically closed by snow from November through March. In May, when the road reopens, the scenery is at its most dramatic — snowpack still heavy on the peaks, rivers running full, and the park essentially empty.
What to Do: Drive the North Cascades Highway (SR-20) from the western entrance near Newhalem to the eastern side at Winthrop — stop at every pullout. Hike the Maple Pass Loop for one of the finest high-country hikes in Washington. Visit Diablo Lake for an impossibly turquoise color created by glacial flour suspended in the water.
Pro Tip: Check WSDOT for the current opening date of the North Cascades Highway in May — it varies by year depending on snowpack. Cell service is nonexistent inside the park. Seattle is about two and a half hours from the western entrance, making this a feasible day trip or weekend destination.
4. Great Sand Dunes National Park, Colorado
Why Nobody Knows About It: Great Sand Dunes sits in the San Luis Valley of southern Colorado, tucked against the Sangre de Cristo Mountains — far from any major highway and rarely on anyone's itinerary. Most people who visit Colorado stick to Rocky Mountain National Park and Mesa Verde. They're missing something genuinely extraordinary.
What Makes It Extraordinary: Great Sand Dunes contains the tallest sand dunes in North America — rising up to 750 feet from the valley floor and set against a backdrop of 14,000-foot mountains. The dunes are a geological impossibility that takes a moment to fully process — a massive sand field in the middle of the Rocky Mountains, fed by sand carried by wind and seasonal streams over thousands of years. Medano Creek runs along the base of the dunes in late spring, creating a beach-like environment in the mountains that draws families and photographers from across the country.
What to Do: Hike into the dunes — there are no marked trails, just open sand. The climb to High Dune is the most popular route and offers excellent views of the full dune field. Wade Medano Creek at the base of the dunes in May when the seasonal surge flow is at its strongest — a genuinely unusual experience. Visit at sunset when the dunes turn gold and the mountain backdrop goes pink.
Pro Tip: Sand temperatures can be dangerously hot by midday in summer — start dune hikes early in the morning or late in the afternoon. Bring sandals or water shoes for creek wading. Alamosa, about 35 miles away, is the most practical base with good hotel options.
5. Pinnacles National Park, California
Why Nobody Knows About It: Pinnacles sits in the Gabilan Mountains of central California — about 130 miles south of San Francisco and 80 miles from the Monterey coast. It was designated a national park in 2013, making it one of the newest in the system, and it still flies almost entirely under the radar despite being within a few hours of millions of California residents.
What Makes It Extraordinary: Pinnacles is the remnant of an ancient volcano that has been split in two by the San Andreas Fault and carried 200 miles north over millions of years. What remains are dramatic volcanic spires, deep talus caves formed by massive boulders, and one of the finest California condor recovery programs in the country — with condors regularly visible soaring above the rock formations. May is the ideal month to visit, with wildflowers covering the hillsides and temperatures still comfortable for hiking.
What to Do: Hike the Bear Gulch Cave and Reservoir loop — passing through a talus cave system with headlamps and emerging at a beautiful reservoir in the heart of the park. Scan the sky for California condors — Pinnacles has one of the largest concentrations of the birds in the state. The High Peaks Trail offers dramatic spire scenery and is one of the finest day hikes in the California park system.
Pro Tip: Pinnacles has two separate entrances — east and west — that are not connected by road through the park. Check which entrance is closest to your approach. The Bear Gulch Cave section may be closed seasonally to protect roosting bats — check the park website before your visit.
Final Thoughts
The national park system's best kept secrets are hiding in plain sight — on the map, accessible, and extraordinary. They're just not on most people's radar yet. That's exactly what makes them worth visiting now, before the crowds catch on. Your America the Beautiful Pass covers entry at every park on this list. Go find your own secret.
