This is a pretty cool list of hiking trails in the US with an overview of each (Source: bootbomb.com).
1. North Country Trail
Length: 4600 miles
Region: Northern United States
Endpoint 1: Crown Point, New York
Endpoint 2: Lake Sakakawea State Park, North Dakota
Shoulder a pack, lace up your boots and heat out to explore this scenic and amazing trail. You can throughout the year, until snow blocks your path. It cuts through seven states, from prairies on the Great Plains to the glacier-filled landscapes in Adirondack Park. If you want to explore large sections of the U.S.A through the jungle, the North Country Trail is just what you need to follow. Cutting through more than 100 state forests and national parks, as well as 10 national forests, the trail gives millions of hikers each year, a view into some of the finest natural locations that North Dakota, Minnesota, Wisconsin, Michigan, Ohio, Pennsylvania and New York have to offer. You will experience sublime scenery in places such as Pictured Rocks, with cliffs and lighthouses over Lake Superior. During fall, experience the sight of changing leaves and the smell of grape harvest, in Finger Lakes, New York. Established more almost 40 years ago, the North County Trail is yet to be completed. Hikers follow abandoned railroad beds, miles of dirt roads, national forests and newly cut trails, giving you the best combination of what nature has to offer.
2. Continental Divide Trail
Length: 3100 miles
Region: Rocky Mountains
Endpoint 1: Mexico
Endpoint 2: Canada
The Continental Divide Trail, otherwise known as the CDT is one of the best and toughest hiking trails that North America has to offer. Although it is challenging, certain sections of the trail are unbelievably breathtaking. Most hikers are attracted to the CDT after testing their hiking skills in the Appalachian Trail and the Pacific Trail. If you hike all 3 in your lifetime, you become a hiking royalty. No doubt about that. Few people manage that feat. Although the Continental Divide Trail is not as popular as the Appalachian Trail and the Pacific Trail, it offers lots of adventure, for the 4 to 5 months that you will be in the jungle. Take the word trail with a pinch of salt because there are large sections of road walking, coupled with route finding in unmarked terrain. You can call them cross-country if you prefer. This is where your navigation skills are brought to the fore. It is not surprising that most hikers tackle the CDT after they have developed extensive hiking and navigation skills. The trail cuts through numerous terrains and ecosystems, including the Chihuahuan Desert in New Mexico, Mountains rising to over 14,000 feet in Colorado and grizzly bear territory as you step in Montana.
3. East Coast Greenway
Length: 3000 miles
Region: Eastern U.S
Endpoint 1: Calais, Maine
Endpoint 2: Key West, Florida
You can take a road trip or a mountain hike across America. However, no adventure is as epic and breathtaking, as hiking across the East Coast Greenway in one path. Although it is not very popular among new hikers, it is an awesome project, which is also used as a biking path. It passes through a wide range of amazing diversity, with lots of cultural and natural history along the route. It also connects diverse landscapes, from the storied rocky coast in Maine, to the palm-lined sandy beaches in Southern Florida. From the gateway to the Canadian Maritimes to historic mill cities and coastal communities, you will experience some of the best adventure in your lifetime that
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