Trinity Site Open House Draws Record-Breaking Crowd to White Sands Missile Range
This Oct. 17 open house was especially significant because it marked the first Trinity Site event in two years due to the 2025 government shutdown, giving visitors a renewed chance to connect with history.
The day drew a diverse crowd from across the country and beyond, with people of all ages and backgrounds coming together to experience the historic site. Subject matter experts, including historians, scientists, and military personnel, were present throughout the event, giving engaging talks, answering questions, and sharing insights into the Trinity Site’s significance. The Los Alamos National Laboratory’s traveling museum captivated visitors with interactive exhibits on nuclear science and the Manhattan Project.
Even four-legged companions were welcome, with more than 50 dogs joining their owners. Their playful energy and friendly interactions delighted attendees, creating a warm atmosphere that made the historic event feel even more inviting.
"Every time we open the Trinity Site to the public, we do more than commemorate a single moment in history. We give people the chance to walk in the footsteps of those who shaped our world, and we fulfill our role as stewards of this distinct historical site," said Cammy Montoya, WSMR Public Affairs Specialist. "By sharing the story of July 16, 1945, and inviting new generations to experience this site firsthand, we help keep the lessons, questions, and impact of that day alive while ensuring its preservation for the future."
A highlight for many was the National Park Service’s cancellation stamp, which was on special loan for the event. Traditionally used at historic national landmarks, the stamp allowed visitors to mark their event programs, journals, or passports with a unique emblem exclusive to Trinity Site. This rare opportunity provided collectors and history enthusiasts with a memorable keepsake from their visit.
During the open house, attendees walked on ground zero and took photos with the iconic obelisk marking the site as a national historic monument. About two miles away, visitors toured the McDonald Ranch House, where the plutonium core for the bomb was assembled. Subject-matter experts answered questions and shared insights into the site's significance and the Manhattan Project's scientific achievements.
Many visitors expressed awe as they explored the ranch house and learned how the scientists lived and assembled the core.
For more information on the open house and future events, visit the White Sands Missile Range homepage at [https://home.army.mil/wsmr/](https://home.army.mil/wsmr/).
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