Adventure Appeal
Surrounded by the Oscura Mountains and seemingly endless expanses of high desert, this is a landscape of enormous skies and empty plains, where visitors can contemplate the dawn of the atomic age amid the peace and quiet of the wilderness.
On July 16, 1945, at 5:29 a.m., Trinity, the world’s first nuclear device, was detonated atop a steel tower in the Jornada del Muerto, or “Journey of the Dead Man,” as the Spanish called this desolate basin. Trinity’s immense power turned sand at ground zero into a slightly radioactive glassy substance with a greenish tint known as trinitite, melted remnants of which still dot the desert floor.
From the visitor center, a shuttle takes you two miles to the restored McDonald Ranch House, where Trinity’s plutonium core was assembled. A walk of a quarter mile will take you to the site’s landmark, a low obelisk of lava rock that marks the spot where the steel tower stood and subsequently was vaporized.
Survival Readiness
Cell service in the Trinity Site basin is hit or miss. Don’t count on it.
Although Trinity is much more accessible than a Pacific atoll, it’s still fairly remote, high desert terrain that commands respect. The test site itself sits at elevation on an active Army bomb range. There’s no shade and very few reliable services. Pack accordingly. Sun protection, extra layers, and adequate water are musts. Temperatures can be hot by midday, cold and windy in the morning.
Radiation levels at ground zero are still about 10 times background, but for a brief visit, not cause for concern. However, the Army asks visitors not to pocket souvenirs of trinitite, the radioactive glass formed by the blast, since it’s mildly radioactive and illegal to remove.
Getting There
Gas up before coming out to avoid stranding yourself (fill up in Socorro, Carrizozo or Truth or Consequences) and don’t count on GPS because they get it wrong often. Follow the directions below.
Directions from West Exit I-25 at MM 139 (near San Antonio, New Mexico) and drive east approximately 12 miles. Directions from East Exit I-25 and take U.S. 380 west approximately 53 miles (from Carrizozo). Visitors may enter through the Stallion Gate located off of U.S. Highway 380.
Trinity is open to the public on the first Saturday in April and third Saturday in October (October 17 in 2026), weather permitting. There is no cost for the regular open house and no registration is required. A valid driver’s license or government-issued photo ID is required for all persons 18 years or older. Please have vehicle registration and proof of insurance available.
Local Perks
For travelers chasing the perfect blend of natural beauty, rich history and New Mexican cuisine, this area delivers.
The surreal gypsum dunes of White Sands National Park are just one day trip away and are well worth the detour. For foodies, the nearby towns of Socorro and San Antonio boast some of the best New Mexican-style restaurants, serving up classic fare like green-chile stew. History buffs will enjoy the White Sands Missile Range Museum and missile park. And when temperatures cool, the Bosque del Apache National Wildlife Refuge hosts thousands of migrating sandhill cranes and snow geese.
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