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The Appalachian Trail Conservancy claims the Appalachian Trail to be the longest hiking-only trail in the world. ... More than three million people hike segments ...
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The Appalachian Mountains are a barrier to east–west travel, as they form a series of alternating ridgelines and valleys oriented in opposition to most highways ...
The Appalachian National Scenic Trail, often called the Appalachian Trail or the A.T., is a hiking trail in the eastern United States.