The bald area atop the mountain covers several , with patches of trees and shrubbery in some places. The Appalachian Trail (following the state border) crosses the mountain's northern slope, with several spurs (usually marked) traversing the top of the mountain. The summit is adorned by a rock pile and a bronze plaque placed to honor the memory of a local highland farmer named Cornelius Rex Peake. There is a panoramic view from the summit, with Grandfather Mountain standing prominently to the east and the Black Mountains visible to the south. The summit of Grassy Ridge Bald is almost entirely within North Carolina. Yellow Mountain () and Little Hump Mountain () comprise the northeastern fringe of the Roan Highlands. Both are traversed by the Appalachian Trail. Among the rocks that make up Roan Mountain, the oldest are a type of metamorphic rock known as Cranberry gneiss. Formed over a billion years ago from ancient ocean sediments, they are among the oldest in the United States. Roan gneiss, another type of metamorphic rock found on the mountain, was formed roughly 800 million years ago. Also in abundance is Beech granite, a type of igneous rock believed to be 700 million years old. The mountains themselves were formed between 200 million and 400 million years ago during the Appalachian orogeny, when the North American and African plates collided, thrusting the rock upward. Native Americans were the first human visitors to Roan Mountain. A Catawba legend tells of a great battle with the Cherokee atop the mountain that left the rhododendron colored crimson and parts of the mountain treeless. While there is no hard evidence that such a battle ever occurred, numerous Native American settlements have been found around the base of the mountain, and the Cherokee settlement of Old Fields stood near modern-day Elizabethton, Tennessee. Throughout the 18th and 19th centuries, botanists paid frequent visits to the area to collect plant specimens. Among them were John Bartram, who crossed the Roan Highlands in the late 1730s while studying the botanical make-up of what is now the southeastern United States. Andre Micheaux followed in 1794, discovering several alpine species rarely found outside of the New England and Canadian latitudes. In 1799, John Fraser explored Roan Mountain, collecting specimens of rhododendron and noting the existence of the fir tree that now bears his name. Other early explorers included Elisha Mitchell, for whom Mount Mitchell is named, and Harvard botanist Asa Gray.