Mount Guyot is a high, remote peak on the Tennessee–North Carolina border in Great Smoky Mountains National Park, ranking as the park’s second-highest summit and the fourth-highest in the eastern United States. Though the Appalachian Trail crosses its south slope, the forested summit remains difficult to reach, and its rugged height is emphasized by steep rises above nearby coves and by Ramsey Cascades on its western side. The mountain is built of ancient Precambrian rocks and was shaped during the Appalachian orogeny. Named for Swiss geographer Arnold Guyot after surveys in the late 1850s, it has long been known for its isolation, a reputation that continues despite trail access.