Cerro Uritorco and the Mark Nobody Explained

GeisTrack Editorial · 4 August 2026 · 6 min read

Cerro Uritorco and the Mark Nobody Explained

In January 1986, a scorched, oval shape appeared on an Argentine hillside, 122 meters long. Forty years later, the town of Capilla del Monte is still looking up at the sky, watching for more.

This spa town, with its narrow streets and rolling hills, is located three hours north of Córdoba. It's known as Argentina's UFO capital, a title it earned on just one morning in January. On January 9, 1986, people in Capilla del Monte reported seeing a large, glowing object coming down onto the eastern side of Cerro Uritorco. This granite peak is 1,979 meters high and dominates the valley. The next morning, something unusual was on the hillside: a flattened, scorched oval. It measured about 122 meters long and 64 meters wide. All the plants inside it were burned down to their roots, and the soil looked different. People took photos and collected samples. Then the arguments began, and they've never really stopped. Many ideas have been suggested to explain what happened. Some thought it was a trick using fuel and rope, others a natural electrical discharge from the sky, or even a fake created with the help of a helicopter. But none of these ideas could explain every detail of the mark, and none were ever fully accepted. What remains is a physical trace that was measured unusually well, but without any agreed-upon cause. This is rare in the field of UFOs, which usually relies mostly on stories from people who claim to have seen something.
What Capilla del Monte did next was smart. Instead of ignoring the event, they embraced it. Every January, the town hosts the National Alien Festival. Local guides offer organized night watches on the lower parts of the mountain. A small museum keeps a log of reported sightings. Hostels often cater to guests who plan to be outside looking up at two in the morning. The sightings that keep all this going are small but steady: slow lights moving along the ridge, stationary points that get brighter and then fade, and occasionally, lights forming shapes. People who doubt these sightings often point out that the area is part of a busy flight path for light aircraft between Córdoba and the northern provinces. But residents simply reply that they've lived under that flight path their whole lives. What truly makes this place special isn't just the mystery; it's the journey itself. Try climbing the mountain in the morning, right after the park rangers open the trail. It's about a four-hour hike up through scrubland and granite to reach the summit, where you'll get a clear view all the way to the Punilla Valley. Then it's three hours back down. Enjoy a meal in town. Afterward, go back out after dark, when the valley cools down and the sky over the Sierras Chicas mountain range becomes truly black. No matter what landed there in 1986, Capilla del Monte is a wonderful place to spend a couple of nights gazing up at the sky.
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