Brown Mountain rises to 2,725 feet on the eastern flank of the Pisgah National Forest, near the Burke and Caldwell county line in western North Carolina. The mountain itself is unremarkable: a low Appalachian ridge covered in second-growth hardwood. The phenomenon associated with it — the Brown Mountain Lights — is what draws visitors to the surrounding overlooks.
Witnesses describe luminous balls of light, variously red, blue, yellow, and white, appearing above the ridge after dark. Reports describe the lights as silent, moving at varying speeds, sometimes hovering, sometimes ascending or descending, and occasionally splitting or merging. The phenomenon does not occur every night, but recurs frequently enough that organized observation has continued for over a century.
Cherokee and Catawba oral tradition references the lights, with stories typically dating them to a battle between the two nations. The first widely-circulated written account appeared in the Charlotte Daily Observer on September 24, 1913, describing "mysterious lights seen just above the horizon every night," red in color, appearing "punctually" at 7:30 PM and again at 10 PM.
The United States Geological Survey dispatched D.B. Sterrett to investigate later that year. Sterrett concluded that the lights observed from Loven's Hotel near Cold Spring Mountain were the headlights of westbound Southern Railway locomotives, and that train schedules matched the reported timing. A 1916 flood disrupted rail service in the region, and the lights were observed during the disruption, undermining the simple railway explanation. The USGS returned in 1922 with geologist George Rogers Mansfield, who proposed that the lights were a combination of locomotive headlights, automobile headlights, brush fires, and stationary lights misperceived through atmospheric refraction. Mansfield's report acknowledged that some sightings remained unexplained.
Subsequent investigations have proposed ball lightning, swamp gas combustion, mineral phosphorescence, piezoelectric discharge from quartz formations under tectonic stress, and atmospheric mirage effects. None of these explanations has gained universal acceptance among researchers. The Lights have been studied by Appalachian State University faculty, the U.S. Army's Aerial Phenomena Investigation Branch, and independent researchers, with periodic publication of new observations and theories.