Trinity Site

The 51,500-acre area was declared a national historic landmark in 1975. The landmark includes Base Camp, where the scientists and support group lived; Ground Zero, where the bomb was placed for the explosion; and the Schmidt/McDonald Ranch House, where the plutonium core to the bomb was assembled. Visitors to a Trinity Site Open House are given the opportunity to visit Jumbo, Ground Zero, and the Ranch House. In addition, one of the old instrumentation bunkers is visible beside the road just west of Ground Zero.

This obelisk, made from basaltic lava from El Malpais National Monument, marks the center of the 100ft. tower where the Gadget was detonated.
Trinity Site Open House Dates20232024202520262027
First Saturday in April1 April6 April5 April4 April3 April
Third Saturday in October21 October19 October18 October17 October16 October

This marker shows the location of Stallion Range Gate, the general public entrance to Trinity Site off of Highway 380.