If you’re planning a trip to a U.S. national park, it’s no surprise that you’ll have plenty of company. In 2024 alone, more than 119 million people visited America’s national parks to experience their natural beauty. But just because these places are popular doesn’t mean you have to fight through shoulder-to-shoulder crowds every time you go.
Some parks are far busier than others, especially during certain months. In this guide, we’ll walk through the 10 most crowded U.S. national parks and share the best times to avoid the rush. Whether you’re looking for solitude, better photo opportunities, or simply a calmer experience, planning around peak season can make all the difference.
1. Great Smoky Mountains National Park
With over 140 million visitors in the past six years, the Great Smoky Mountains is the most visited national park in the U.S. Most of those visits happen in summer and fall, with June, July, August, and October seeing well over a million visitors each month.
Autumn paints the mountains in rich hues of red, orange, and gold.
If you’re trying to avoid heavy traffic and packed trails, aim for January or February. These months each see fewer than half a million visitors. Just keep in mind that some facilities and roads may close due to weather, so check park updates before you go.
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2. Yellowstone National Park
Yellowstone is second on the list, attracting over 32 million visitors in six years. July and August are especially busy as travelers flock to see geysers, hot springs, and wildlife.
The vivid colors of Grand Prismatic Spring draw thousands of visitors each summer.
If you want to see Yellowstone with fewer people around, consider visiting in November, December, or March. Just be prepared for cold temperatures and snow, which can limit access to certain areas. Hiring a guide or joining a winter tour can help you navigate the conditions safely.
3. Grand Teton National Park
Just south of Yellowstone, Grand Teton sees more than 29 million visitors every six years, with peak numbers in summer. The scenic mountain views and lakes are undeniably stunning, but they’re much more enjoyable without the summer crowds.
The towering mountains create a perfect mirror image on the still water.
Plan your trip for December, January, or February for a quieter experience. April is another good option if you prefer milder weather and fewer visitors.
4. Grand Canyon National Park
The Grand Canyon remains one of America’s most iconic natural wonders, and more than 27 million people have visited in the past six years. Summers are particularly busy, as visitors pack both the South and North Rims.
The iconic red and orange cliffs of the Grand Canyon stretch for miles under a clear sky.
If you’d rather have more space to yourself, visit in January or February. These months typically see fewer than 200,000 visitors, thanks to chilly weather and occasional snow at higher elevations.
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5. Zion National Park
Utah’s Zion National Park has become increasingly popular in recent years, drawing over 27 million visitors. Its red rock cliffs and narrow canyons are busiest in spring and fall when the weather is mild.
Zion’s rugged cliffs glow in the soft light of a clear day.
To avoid the crowds, try visiting in January or February. While it’s colder and snow is possible, many of the park’s trails and sights are still accessible, and you’ll have more breathing room.
6. Saguaro National Park
Unlike many other parks, Saguaro National Park in Arizona is busiest in late winter and spring when desert temperatures are more comfortable. Over the last six years, it welcomed more than 27 million visitors, with February and March being peak months.
A quiet trail winds through towering cacti in Saguaro National Park.
To escape the crowds, consider visiting in July or August. Summer brings extreme heat, so take precautions and plan early morning hikes. Fewer than 37,000 visitors typically brave the heat each month during this period.
7. Rocky Mountain National Park
Colorado’s Rocky Mountain National Park is a favorite for hikers, climbers, and wildlife watchers. It’s busiest in summer and early fall, attracting more than 25 million visitors over six years.
Moody clouds hang over the mountains as fall colors brighten the valley below.
If you’d prefer snow-covered trails and serene landscapes, visit in January, February, or December. These months average about 110,000 to 125,000 visitors, a fraction of the park’s peak summer crowds.
8. Yosemite National Park
Yosemite’s towering granite cliffs, waterfalls, and giant sequoias bring over 22 million visitors every six year. Summer months are the most crowded, with long waits at park entrances and packed campgrounds.
Yosemite’s iconic granite walls and waterfalls mirrored perfectly in the still water.
January, February, and March are the best months to enjoy Yosemite in relative solitude. Winter weather means some roads and areas may be closed, but you’ll get a completely different view of the park with far fewer people.
9. Acadia National Park
Located on the coast of Maine, Acadia is especially popular in fall when the foliage peaks. Over 22 million people visited the park in six years, with crowds highest in October.
Waves meet rugged cliffs along the scenic shores of Acadia National Park.
For the quietest experience, visit in January, February, or December, when visitor numbers drop below 17,000 per month. Alternatively, March and November offer mild weather and fewer crowds than the fall peak.
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10. Olympic National Park
Rounding out the list is Washington State’s Olympic National Park, which features rainforests, alpine peaks, and rugged coastline. It’s drawn over 22 million visitors in six years, with summer bringing the largest crowds.
The dramatic peaks of Olympic National Park peek through clouds above lush hillsides.
If you’d rather enjoy the park’s beauty without the summer surge, visit in January or February. These months see fewer than 85,000 visitors each, making it easier to enjoy the sights in peace.
Why off-peak travel is worth it
Beyond avoiding crowds, visiting national parks during their quietest months has other benefits. You’ll likely find lower lodging rates and have an easier time booking campsites. Wildlife behavior and scenery often change dramatically with the seasons, giving you a unique perspective most visitors miss.
Traveling in the off-season means dressing for the elements, and a warm, insulated winter jacket can make your visit far more comfortable on icy trails and chilly mornings.
Planning your trip during the off-peak season also supports sustainable tourism by easing the strain on park infrastructure and preserving natural areas.
Tips for planning your visit
Check road and facility closures. Winter and shoulder seasons often come with limited access, so review the park’s official website for current conditions.
Pack appropriate gear. Cold temperatures, snow, and ice are common in winter. Bring layers, waterproof hiking boots, and other essentials.
Consider guided tours. In parks like Yellowstone or Yosemite, winter tours can help you safely access hard-to-reach areas and learn more about the park.
Bring a lightweight daypack. Carry essentials like water, snacks, and an extra layer easily with a comfortable hiking daypack that won’t weigh you down.
Start early. Even in off-peak months, popular viewpoints and trails can still get busy by midday. Arrive early for the best experience.
By knowing when to visit these busy parks, you can avoid the stress of peak-season crowds and enjoy a more peaceful, memorable trip.
Final thoughts
Visiting America’s national parks is one of the best ways to connect with nature, but dealing with large crowds can take away from the experience. By planning your trip during the quieter months, you’ll enjoy more space, better photo opportunities, and a deeper appreciation for the beauty around you. Plus, traveling off-peak helps preserve these parks for others by reducing the strain of over-tourism.
So whether you’re hiking through snowy trails, catching a sunrise without the crowds, or just savoring the peace and quiet, timing your visit right is worth it. With the tips and suggestions above, you can make the most of your national park adventures and create memories you’ll actually want to remember.