30 days in United States Itinerary

Great Smoky Mountains National Park contains some of the highest mountains east of the Mississippi River, but it's the ease of access that makes this national park the United States' most visited.

Visiting Roaring Fork and Mount LeConte will get you outdoors. There's much more to do: cruise along Newfound Gap Road, get to know the fascinating history of Noah Bud Ogle Cabin, tour the pleasant surroundings at Upper Tremont Road in Great Smoky Mountains National Park, and trek along Alum Cave Trail.

To see reviews, traveler tips, where to stay, and other tourist information, read Great Smoky Mountains National Park online tour itinerary planner.

Washington DC to Great Smoky Mountains National Park is an approximately 3.5-hour flight. You can also do a combination of train and bus; or take a bus. In May, daytime highs in Great Smoky Mountains National Park are 79°F, while nighttime lows are 57°F. Finish your sightseeing early on the 18th (Mon) to allow enough time to fly to Moab.

The gateway to Utah's popular canyon country, Moab sits engulfed in the middle of desert wilderness.

Start off your visit on the 19th (Tue): stroll through Double Arch and then explore the wealth of natural beauty at Arches National Park. On the next day, get a new perspective on things with Boat Tours & Water Sports and then see Off-Road Tours.

To find photos, more things to do, reviews, and tourist information, use the Moab road trip planning website.

Traveling by flight from Great Smoky Mountains National Park to Moab takes 9.5 hours. Alternatively, you can do a combination of flight and car; or do a combination of bus, subway, train, and car. The time zone difference moving from Eastern Standard Time to Mountain Standard Time is minus 2 hours. Traveling from Great Smoky Mountains National Park in May, expect little chillier with lows of 49°F in Moab. Finish up your sightseeing early on the 20th (Wed) so you can travel to Grand Canyon National Park.

The size, shape, and color of Grand Canyon National Park combine to leave an impression on visitors as deep as the canyon itself.

Take a break from the city and head to Bright Angel Trail and Rim Trail. The adventure continues: explore the stunning scenery at Grand Canyon South Rim, stroll through North Kaibab Trail, trek along Tonto Trail, and see Bar 10 Ranch.

To find reviews, maps, photos, and more tourist information, use the Grand Canyon National Park route site.

Getting from Moab to Grand Canyon National Park by combination of flight and bus takes about 9 hours. Other options: do a combination of car, flight, and bus; or do a combination of car and bus. Expect slightly colder temperatures when traveling from Moab in May; daily highs in Grand Canyon National Park reach 68°F and lows reach 33°F. Finish your sightseeing early on the 25th (Mon) to allow enough time to travel to San Francisco.

San Francisco is a top holiday destination featuring scenic beauty and great ethnic and cultural diversity.

Take a break from the city and head to Alcatraz Island and Fishing Charters & Tours. Next up on the itinerary: contemplate the long history of Golden Gate Bridge, examine the collection at Musee Mecanique, stroll around Golden Gate Park, and pause for some photo ops at Coit Tower.

To see reviews, maps, and more tourist information, read our San Francisco journey planner.

You can do a combination of bus and flight from Grand Canyon National Park to San Francisco in 8.5 hours. Alternatively, you can do a combination of shuttle, bus, and subway. The time zone difference when traveling from Grand Canyon National Park to San Francisco is minus 1 hour. Traveling from Grand Canyon National Park in May, you can expect nighttime temperatures to be a bit warmer in San Francisco, with lows of 53°F. Wrap up your sightseeing on the 28th (Thu) early enough to travel to Yosemite National Park.

Massive granite mountains, towering waterfalls, groves of Giant Sequoia trees, and wilderness as far as the eye can see distinguish the landscape of Yosemite National Park.

Step out of the city life by going to Sentinel Dome and Mariposa Grove. There's lots more to do: trek along Nevada Falls Loop, tour the pleasant surroundings at Panorama Trail, admire the sheer force of Yosemite Falls, and explore the striking landscape at Glacier Point.

For photos, more things to do, where to stay, and tourist information, use the Yosemite National Park road trip planning tool.

Use the Route module to find suitable travel options from San Francisco to Yosemite National Park. Traveling from San Francisco in May, Yosemite National Park is a bit cooler at night with lows of 34°F. Wrap up your sightseeing by early afternoon on the 2nd (Tue) to allow enough time to travel to Stanley.

Stanley is a town in Custer County, Idaho, United States. On the 3rd (Wed), let the river carry you with a rafting and tubing tour.

To find where to stay, ratings, photos, and more tourist information, read Stanley attractions planner.

Do a combination of bus and flight from Yosemite National Park to Stanley in 10 hours. Alternatively, you can drive; or do a combination of taxi, bus, train, and car. The time zone changes from Pacific Standard Time (PST) to Mountain Standard Time (MST), which is usually a 1 hour difference. Traveling from Yosemite National Park in June, things will get little chillier in Stanley: highs are around 72°F and lows about 34°F. Wrap up your sightseeing by early afternoon on the 3rd (Wed) to allow time for the car ride to Yellowstone National Park.

An exceptionally diverse landscape and varied wildlife have made Yellowstone National Park one of America's most popular parks.

Step out of the city life by going to Grand Canyon of the Yellowstone and Grand Prismatic Spring. There's much more to do: take in the natural beauty of Fountain Paint Pot, get impressive views of Mud Volcano, take in the dramatic scenery at Upper Falls of the Yellowstone River, and hike along Observation Point Trail.

Planning Yellowstone National Park trip won't be overwhelming when you use Inspirock's itinerary maker.

Traveling by car from Stanley to Yellowstone National Park takes 7.5 hours. Alternatively, you can do a combination of car and flight; or do a combination of car, bus, and taxi. While traveling from Stanley, expect little chillier days and about the same nights in Yellowstone National Park, ranging from highs of 66°F to lows of 34°F. On the 9th (Tue), wrap the sightseeing up by early afternoon so you can fly to New York City.

Writer Pearl Buck once called New York City “a place apart,” and this giant urban center remains unlike any other in the world.

Take a break from the city and head to Speed Boats Tours and Horse-Drawn Carriage Tours. There's lots more to do: enjoy breathtaking views from Empire State Building, take in the architecture and atmosphere at St. Patrick's Cathedral, learn more about the world around you at American Museum of Natural History, and admire the landmark architecture of Grand Central Terminal.

For traveler tips, more things to do, other places to visit, and tourist information, go to the New York City trip planner.

You can fly from Yellowstone National Park to New York City in 7 hours. Another option is to drive. Due to the time zone difference, you'll lose 2 hours traveling from Yellowstone National Park to New York City. Expect a bit warmer weather when traveling from Yellowstone National Park in June: highs in New York City hover around 80°F, while lows dip to 65°F. Cap off your sightseeing on the 13th (Sat) early enough to catch the flight back home.