The Atomic Age began right here in New Mexico. At 5:29 a.m. MST, on July 16, 1945, the world’s first atomic bomb was tested at White Sands Missile Range (WSMR) in the Tularosa Basin. Now registered as a site of historical significance, the Trinity Site Open House takes place only twice a year, in April and October. Plan your visit to this important modern marvel, on Saturday, October 17, 2026, 8 a.m. – 2 p.m.
The open house is free, and no reservations are required. Entrance is twofold. The Alamogordo Caravan, which meets at the Tularosa High School Athletic Field Parking Lot, is an escorted group that sets out at 8 a.m., but is only open to the first 125 vehicles for safety purposes. All other visitors must enter through the Stallion Gate, off U.S. Highway 380. Both routes are approximately the same distance and take the same amount of time.
Once inside, visitors take a short hike one-quarter mile to ground zero, where a small obelisk marks the exact spot where the bomb was detonated. Historical photos are mounted on the fencing surrounding the area. Some of the greatest scientific minds of the time worked on the bomb, led by Dr. J. Robert Oppenheimer, who is credited with being the father of the Atomic Age. Walking in their footsteps can be both thrilling and sobering, depending on your understanding of the magnitude of the event.
Wear comfortable, protective clothing, walking shoes, sunscreen, and other items to stay safe from the New Mexico heat.
Get more information about the Trinity Site Open House.
Posted by Ruidoso.com
