Rocky Mountain National Park in Colorado is one of the most jaw-droppingly beautiful places I've ever visited.

Just an hour and a half from Denver, this iconic and sprawling park is easy to access for a day trip. Just keep in mind you'll need timed-entry reservations during the busy summer months.

Here, you can hike to incredible lakes and waterfalls on easy to moderate trails. I recommend starting from Bear Lake, where several scenic routes begin. Or, you can take a drive along Trail Ridge Road, which climbs to over 12,000 feet above sea level and offers sweeping views, along with chances to see wildlife.

Great Smoky Mountains National Park, located on the border of Tennessee and North Carolina, is consistently the most-visited national park in the country — and I can see why.

Just over an hour from Knoxville and a short drive from the quirky town of Gatlinburg, it's easy to visit for a day trip or longer.

I love that you don't need to be an avid hiker to enjoy this park. Some of the best scenic overlooks, such as Newfound Gap and Kuwohi (the park's highest point), are accessible by car with short, paved walks to panoramic views.

There are also plenty of beginner-friendly hikes to waterfalls and historic cabins, making it an ideal starting point for first-time national park visitors.

Yellowstone National Park is a must-visit for any first-time national park traveler. Spanning parts of Wyoming, Montana, and Idaho, it's best accessed through cities like Jackson, Wyoming, or Bozeman.

The park offers an unforgettable mix of hot springs, geysers, and wildlife. With minimal walking, you can see iconic spots like Old Faithful, the Grand Prismatic Spring, and the Grand Canyon of the Yellowstone. You might even spot bison, elk, or bears from the roadside.

With well-maintained roads, visitor centers, and lodges throughout the park, I find it's easy to navigate and unlike anywhere else in the world.

In my opinion, Arches National Park in Utah is one of the most visually striking and easy-to-navigate parks in the country.

Located just minutes from the outdoorsy town of Moab, and under four hours from Salt Lake City, it's relatively accessible and the drive itself is beautiful.

The park is packed with over 2,000 natural sandstone arches and otherworldly rock formations, many of which are visible right from the road or by taking short, easy hikes.

Arches is a perfect introduction to red-rock landscapes and an excellent choice for travelers who want big views without strenuous hiking.

Death Valley National Park in California, which is about two hours from Las Vegas, is a surreal and surprisingly accessible desert landscape.

Despite its extreme name, many of the park's most iconic spots, such as Badwater Basin, Zabriskie Point, and Artists Drive, are accessible by car with little to no hiking required.

I think it's a great winter or early spring destination, offering incredible views, dramatic colors, and landscapes you can't see in many other places.

In my opinion, Grand Canyon National Park in Arizona is one of the most iconic national parks. It's also one of the easiest to visit. Just a few hours from Phoenix or Las Vegas, the South Rim is open year-round and offers stunning views right from the edge.

I recommend hiking into the canyon, but walking along the Rim Trail, stopping at scenic overlooks, or catching the sunrise at Mather Point are just as beautiful.

With visitor centers, shuttle buses, and numerous amenities, it's ideal for a first-time park experience.

Haraden's general advice is simple: "Be smart." 

While park rangers are there to support visitors, Haraden said safety is up to the individual. 

"The park service's philosophy on safety is that your safety is your responsibility," he said.

Haraden said throughout his career, he talked to visitors with overly ambitious itineraries.

They might enter a park with the goal of visiting every viewpoint in a single day. While this is one way to explore, Haraden believes traveling slower gives visitors a chance to soak in the park's natural beauty. 

"I think the biggest mistake I see people make is trying to be too fast," he said. "They go out to a viewpoint at the Grand Canyon and go, 'Been there, done that.'''

He urges visitors to experience a national park instead of checking things off a list. That might mean watching the sunrise, reading a book by a river, or slowing your hiking pace.

"Don't try to do everything," he said. "Enjoy some things to the full depth you can."

Haraden said there are plenty of national parks without hordes of people, but it can take time and research to figure out which parks and areas are less crowded.

"Do your homework and stay flexible," he said. "Nowadays, doing your park homework involves knowing what's going to be crowded. If you go to a park like Arches in the middle of summer, it's going to be packed. So go to a place that's less visited, like Canyonlands."

Even then, you're still likely to run into people if you stick to the main viewpoints, Haraden said. The farther you get into the national park, the higher your chance of finding solitude. 

Beyond looking at how crowded parks are, Haraden suggests researching every park you plan to visit beforehand. This will help you craft an itinerary that meets your wants and needs. 

"Know what you want," he said. "Do you like to hike? If you like the hike, what kind of hikes do you like to do? Do you like flat ones? Do you like vigorous ones?" 

Haraden's best advice for researching national parks is to use the National Park Service's websites. Every national park has a detailed website, which tells visitors about the park, its crowds, and what to expect when visiting. 

While Haraden said it's helpful to research and have an itinerary before arriving at a national park, he also advises visitors to be adaptable. 

"Don't get locked into the mindset that 'I must do something,' because you might get there and it's too crowded to do it, or the parking lot is full," he said. 

Variables like weather and crowds can impact how you experience a park, so Haraden recommends coming up with an open plan with backup options in case an activity doesn't work out. 

"Running out of water is probably one of the worst mistakes you can make," Haraden said. 

The National Park Service warns visitors that there's a higher risk of heat-related illness, especially during the summer months. Part of being prepared is ensuring you pack enough water or a water-filtration system.

The National Park Service encourages visitors to bring their own reusable water bottles to reduce waste. While there are water fountains available across national parks, visitors won't find many places to purchase a bottle of water. 

Haraden said that if you do your research, you'll likely know what to expect and what you'll need for a national park trip.

That might mean packing a windbreaker or extra jacket for trails with high elevation or making sure you have bear spray if you're exploring a park like Yellowstone or Grand Teton, which are populated by bears.

"Even if you don't use it, you're ready in case you do need it," Haraden said. 

"Wildlife, big and little, are not tame," Haraden said. "Squirrels can bite, and bison can toss people in the air. There's not a single animal that can't hurt you if you pester them or threaten them enough. Any time you change an animal's behavior, you're too close."

He said he'd heard stories of people trying to feed bears or placing their children on the backs of bison. 

Those stories often make headlines, and every year, national park visitors are injured or die due to getting too close to wild animals. 

Haraden added that it's a lose-lose scenario since the animals involved sometimes must be euthanized. 

Whether it's a campsite, cabin, or hotel, national parks across the country offer a wide range of accommodations for visitors. 

Haraden said many of the accommodations are reasonably priced. For instance, a room at the Lake Crescent Lodge in Olympic National Park in Washington starts at $50 during the offseason.

"Everyone thinks they're more expensive than lodging outside of the park, but that's not necessarily true," he said. "The park service wants to make them available to everybody, but you do have to reserve them way in advance."

"Many western parks are high in elevation. Some are obvious, like Rocky Mountain or Glacier, but others are not obvious, like Grand Canyon and Bryce Canyon," Haraden said. "Elevation can really affect people who aren't used to it or have medical conditions."

If you're traveling from lower altitudes like Florida, for instance, taking the time to acclimate can help ensure that you'll enjoy your trip and not end up with altitude sickness.

"It's getting hotter and staying hot longer, and that includes in national parks," Haraden said. "Take all the precautions, but especially don't exert yourself during the hottest part of the day."

That might mean getting to a national park earlier or later in the day to enjoy cooler hours or planning trips during the shoulder seasons when the summer temperatures are gone. 

Haraden said guests shouldn't rely on their phones to navigate the national parks since many areas lack full cell coverage.

"GPS will commonly not work in remote areas like national parks. Carry maps and know how to read them," he said.

He also encourages visitors not to blindly follow their GPS if they decide to use it.

"If GPS says to use a road but it looks too rough, use your common sense and don't go there. If GPS says to follow a trail that is not there, don't do it," he said.

Across any national park, you'll find park rangers who are there to answer questions and help create a positive experience inside each national park.

"The park rangers have all the information you need to make decisions," he said.

They can help point visitors to good hikes, and they know the weather and other important information that might be handy. Haraden said visitors should never hesitate to approach a park ranger with questions. 

Haraden isn't referring to the people entering the parks tomorrow or next year. He's referencing the future generations of visitors exploring the otherworldly Arches National Park and the geyser-filled wonderland of Yellowstone. 

He said he hopes national park visitors are doing their part to be stewards of the land, which means modeling behavior like picking up trash, giving animals space, and not packing disposable plastic water bottles. 

Anderson said one of the most underrated trips they've ever taken was to South Dakota in the summer of 2022, where they spent the Fourth of July camping at Custer State Park.

"We were able to get a last-minute camping spot, and it wasn't crowded," she said. "You could spend a week there because it's so beautiful, and there's so much hiking."

It was a sunny 75 degrees Fahrenheit — perfect for hiking, Anderson said. During her hikes, Anderson appreciated the park's unique geographic features.

"Custer Park is known for having these rock spires. I've never seen anything like it," she said. "You get a really good reflection of the rock formations on Sylvan Lake."

The park is also full of grasslands and wildlife, from donkeys to bison, she added.

"You can drive from Custer to Badlands National Park, and you can also stop by Mount Rushmore," Anderson said. "So you can easily make a whole road trip there."

In July 2023, Anderson explored hidden gems in eastern Idaho.

"Grand Teton National Park is really popular, but on the other side of the Tetons, the Idaho Teton Valley isn't very popular," Anderson said. "They have amazing wildflower hikes, mountains, and waterfalls."

Anderson said she also explored sand dunes nearby.

"No one was there when we went except for a few people on ATVs," she said. "But for sunset, we had the sand dunes completely to ourselves."

"Sedona, Arizona, is obviously a really popular destination, but a lot of people don't visit during the summer because it's really hot," Anderson said. But when she went in late August 2024, temperatures had cooled down a bit, and there were still no crowds.

"It would be a good destination for people who don't mind getting up early to hike and or like hiking at sunset," she said. "We hiked at sunrise and sunset to beat the heat, and we had a lot of the trails to ourselves."

Anderson recommends staying at Ambiente Sedona, an adults-only hotel, and spending the hottest hours of the day at the pool.

"In South Carolina, everybody goes to Charleston, but we went to this place called Carolina Heritage Outfitters in the Edisto River area of South Carolina," Anderson said.

Carolina Heritage Outfitters is a tour company that offers treehouse camping by canoe. Anderson told BI that her tour guide said it's a popular activity among locals.

"You canoe downstream a very easy 10 miles to a treehouse, stay overnight, and then canoe 10 miles back to the tour company," Anderson said. "That was one of the coolest things that we've done. We travel all the time, and we've never done anything like that."

Anderson said she's been to Wyoming many times.

"I think, in general, it's underrated as a state to visit for tourism. It is obviously popular because of Yellowstone and Grand Teton National Park," she said. "But you don't really hear about people going other than that."

South of the Tetons in Wyoming, the Wind River Range offers a similar experience and is far less crowded, Anderson said. For maximum privacy, Anderson recommends pitching a tent at the free campsites in the Green River Lakes area, as she did in July 2024.

"You do have to prepare because it is remote, there's no service, and we took a 20-mile dirt road to get there," she said. "But there's nobody else around. You can go swimming, and the landscapes are so beautiful."

Medicine Bow National Forest is another underrated destination in southern Wyoming.

"We went there in the summer of 2023, and they have amazing lakes and mountain peaks that made me surprised that it's not more popular," Anderson said.

"Mammoth Lakes in California is really popular during the winter because it has great skiing," Anderson said. "Fewer people go during the summer, but it's one of the best hiking destinations we've been to."

Anderson went in 2022 and hiked through mountains, swam and kayaked in the lakes, and marveled at waterfalls.

"It's like a quintessential summer experience," she said.