The Marfa Mystery Lights: Desert Optics and the 1883 Record

The first written account of lights seen east of Marfa dates to eighteen eighty-three, when a cowhand named Robert Ellison recorded seeing luminous phenomena in the desert at night while driving cattle through the area. He was not sure what he was seeing. Nobody since has been completely sure either, which is part of why the lights have been generating theories for nearly one hundred fifty years.

The explanations have evolved with the technology available to explain them. Early accounts favored Apache campfires, or phosphorescent minerals, or supernatural agency. As roads came to the Trans-Pecos, the theory shifted to vehicle headlights on distant highways being refracted and bent by temperature inversions in the desert air. In two thousand four, physics students from the University of Texas at Dallas published findings consistent with this explanation: most sightings of the Marfa lights are car headlights on the road toward Presidio, bent by layers of warm and cool air in the desert basin.

The scientific explanation has not killed the mystery. The lights have not become less interesting because of it. Partly this is because temperature inversions in a desert basin can do genuinely strange things to light, and "distant headlights bent by atmospheric optics" is not a sentence that makes the phenomenon feel ordinary. Partly it is because the Chihuahuan Desert at night, at this scale of emptiness, makes almost anything you see feel like it requires a longer explanation than physics can comfortably provide.

The official viewing area is on US Route sixty-seven, east of Marfa. The lights appear most often on clear, moonless nights. Bring a jacket. The desert at elevation loses heat quickly after dark.