White Sands Proving Grounds in Socorro County, New Mexico — The American Mountains (Southwest)

Trinity Site

2004

1. Trinity Site Marker

Inscription. Click to hear the inscription.

The world's first atomic explosion occurred on July 16, 1945, at the Trinity Site near the north end of the historic Jornada del Muerto. It marked the beginning of the nuclear age, and the culmination of the Manhattan Project. The site, now part of the White Sands Missile Range, is closed to the public.

Topics. This historical marker is listed in these topic lists: Science & Medicine • War, World II.

Location. 33° 53.067′ N, 106° 40.3′ W. Marker is in White Sands Proving Grounds, New Mexico, in Socorro County. Marker is on U.S. 380 near WSMR P Route 7 (State Road 525). Touch for map. Marker is in this post office area: San Antonio NM 87832, United States of America. Touch for directions.

Other nearby markers. At least 3 other markers are within 12 miles of this marker, measured as the crow flies. Carthage-Tokay-Farley (approx. 3.1 miles away); San Pedro (approx. 10.2 miles away); San Antonio (approx. 11.8 miles away).

Additional comments.
1. Trinity Site
The first atomic bomb was tested at 5:29:45 A.M. Mountain War Time on July 16, 1945. It was a 19 kilton explosion

rear of Trinity Site Marker image. Click for full size.

By Bill Kirchner, July 21, 2011

2. rear of Trinity Site Marker

that ended the war in the Pacific but also brought the world into the atomic age. The explosion took up a 51,500 acre area. The site is now a Historical and National Landmark, and is on what is now White Sand Missle Range. It is open to the public twice a year.

— Submitted October 24, 2012.

By Bill Kirchner, July 21, 2011

3. Trinity Site Marker

View east on US-380. Not much has changed since 2004.

Credits. This page was last revised on January 20, 2020. It was originally submitted on January 5, 2009, by Kevin W. of Stafford, Virginia. This page has been viewed 1,450 times since then and 19 times this year. Photos: 1. submitted on January 5, 2009, by Kevin W. of Stafford, Virginia. 2, 3. submitted on July 28, 2011, by Bill Kirchner of Tucson, Arizona.