Hiking through America’s national parks is like stepping into a postcard. These trails aren’t just stretches of dirt; they’re adventures that take you into the heart of some of the most beautiful places on Earth. From towering waterfalls and vast canyons to wildflower-filled meadows, America’s first national parks offer some of the most breathtaking hiking experiences you’ll find anywhere. Whether you’re a seasoned hiker or just starting out, these parks have trails that will leave you with memories for a lifetime. Grab your boots, pack your gear, and get ready to explore some of the most stunning natural wonders in the United States. Here are the best hiking trails in these iconic parks and all the tips you’ll need for the perfect trek.

Yellowstone National Park - Fairy Falls Trail

Yellowstone, the world’s first national park, is filled with iconic features, and Fairy Falls Trail is one of its most rewarding hikes. This relatively flat trail meanders through a lush lodgepole pine forest, eventually leading to the stunning Fairy Falls, which plunges 200 feet into Fairy Creek. It’s about 5.4 miles round-trip if you hike to the falls and back, but adventurous hikers can extend it to 6.7 miles by continuing on to view Spray and Imperial Geysers, two smaller but fascinating geothermal features. Near the trailhead, a short side trail leads to the Grand Prismatic Spring Overlook, providing one of the best views of the park’s famous rainbow-hued hot spring.

The trail offers a mix of serene landscapes and exciting sights and is perfect for both beginner and seasoned hikers.

Parking is limited, so arrive early in the day to secure a spot at the Fairy Falls Parking Lot. Be sure to bring water and bug spray, especially in the summer when mosquitoes are common.

Yosemite National Park - Mist Trail

The Mist Trail is a must-do for anyone visiting Yosemite, offering a uniquely misty and invigorating hike to two of the park’s most famous waterfalls. On this trail, you’ll climb past the roaring Vernal Fall and the 594-foot Nevada Fall. The spray from Vernal Fall splashes the pathways, giving the trail its name and leaving hikers refreshed (and sometimes soaked). This hike is moderate yet rewarding, with steep stone steps leading up to Vernal Fall. Those who want more of a challenge can continue to Nevada Fall for panoramic views of Yosemite's majestic granite peaks.

The trail spans about 7 miles round-trip if you go all the way to Nevada Fall, but shorter hikes to Vernal Fall or even the bridge below it are great options for less experienced hikers.

Wear shoes with good traction, as the steps near Vernal Fall can get slippery. To avoid crowds, hit the trail early in the morning or late in the afternoon.

Grand Canyon National Park - South Kaibab Trail

The South Kaibab Trail offers one of the best ways to experience the vast grandeur of the Grand Canyon. Starting at Yaki Point, this trail descends along a ridgeline, giving hikers uninterrupted views of the colorful canyon walls. A popular destination is Ooh Aah Point, just under a mile from the trailhead, where you can soak in what may be the canyon’s best views. For a more immersive experience, continue to Cedar Ridge at 1.5 miles. Though the trail is only moderately long, it’s known for its exposed, steep sections that make the climb back up a real challenge.

It’s important to note that there is no access to drinking water beyond the trailhead, so proper preparation is critical.

Start early to avoid the heat, especially in summer, and bring more water than you think you’ll need. Sunscreen, a wide-brimmed hat, and plenty of snacks will also help make the trek more comfortable.

Glacier National Park - Highline Trail

The Highline Trail is Glacier National Park’s signature hike, offering jaw-dropping views nearly every step of the way. The trail begins at Logan Pass and winds along the Continental Divide, passing alpine meadows blanketed in wildflowers and towering mountains that seem to scrape the sky. One of the most thrilling parts of the trail is the Garden Wall, a narrow section with a steep drop on one side. While the exposure might be nerve-wracking, there’s a cable anchored to the rock wall for support.

The full hike is about 11 miles round-trip to Granite Park Chalet and back, but even a few miles out and back will treat you to stunning vistas. Keep a lookout for wildlife because mountain goats and bighorn sheep are often spotted along the way.

Snow can linger on the trail well into summer, so check conditions beforehand and be prepared with proper gear if needed. Trekking poles can help with balance, particularly on steeper sections.

Great Smoky Mountains National Park - Alum Cave Trail

This well-loved trail in the Smokies offers a varied and scenic hike with plenty to see along the way. The Alum Cave Trail begins as a relatively easy trek along a creek before introducing hikers to landmarks like Arch Rock, a large stone arch, and the Alum Cave Bluffs, a massive overhang with sweeping views of the forest. For those up for a bigger challenge, the trail continues to Mount LeConte, one of the Smokies’ highest peaks.

The hike to Alum Cave Bluffs is about 5 miles round-trip and makes for an engaging half-day adventure. Expect serene forest scenery, interesting rock formations, and plenty of opportunities to spot the park’s famous salamanders.

Arrive early to grab a spot at the trailhead parking lot, as it fills up quickly. Be prepared for loose gravel in certain sections of the trail, which can make footing a bit tricky.

Olympic National Park - Hoh River Trail

Olympic National Park’s Hoh River Trail transports hikers into a world of green. This trail meanders through the Hoh Rainforest, where moss drips from tree branches and the forest floor is blanketed in ferns. The serene path runs alongside the river and is mostly flat, making it ideal for those who prefer a more relaxed hiking experience.

While the trail is 18 miles one way, most hikers opt for a shorter out-and-back route. A popular option is a 5-mile round-trip hike, which allows plenty of time to take in the incredible scenery without overexertion.

Even on a sunny day, it’s wise to bring a light rain jacket or waterproof gear since the rainforest’s weather can change suddenly. Slow down and enjoy the quiet surroundings. This trail, like so many others, is as much about the experience as it is about the destination.