Announcements
Trinity site will now only be open to the public on the third Saturday in October.
The open house event schedule will remain the same, with access to the site at Stallion Gate off of highway 380, and the event beginning at 8 a.m. with the gate closing at 2 p.m. and the event ending at 3:30 p.m.
The date for the upcoming Trinity Site Open House is October 18, 2025.
The Alamogordo Caravan is cancelled indefinitely.
WSMR employees may not use their uprange access to enter through WSMR gates to get to the Trinity Site Open House. They must enter through the Stallion Gate during 8 a.m. and 2 p.m. Those attempting to use the WSMR Gates will be turned away by DES at the site.
DATE AND TIME
Upcoming Date: October 18, 2025
Stallion Gate Hours: 8:00 a.m. - 2:00 p.m.
Trinity Site prompt closure: 3:30 p.m.
BE PREPARED FOR YOUR NEXT VISIT BY DOWNLOADING OUR TRINITY SITE DIGITAL BROCHURE HERE
SITE ACCESS: STALLION GATE
All visitors must enter the site through the Stallion Gate located off U.S. Highway 380. Directions here
MEMBERS OF THE PRESS
Members of the press who would like to cover the upcoming Trinity Site open house must register with our Public Affairs Office here:
Directions
**DO NOT use GPS to get to Trinity Site use directions below**
Stallion Gate Entrance
Exit I-25 on mile marker 139 (San Antonio, N.M.) and head 12 miles east or exit U.S. Highway 54 onto U.S. Highway 380 and head west 53 miles of Carrizozo, N.M. Turn south on New Mexico State Highway 525 and head south five miles to the Stallion gate.
The Alamogordo Caravan is cancelled indefinitely
Update as of February 8, 2024: **The Alamogordo Caravan will NO longer allow access through the Tularosa Gate.**
TRINITY SITE MAP - DOWNLOAD HERE
Real ID
All states and territories are now either fully compliant with the Real ID Act OR have been granted extension until May 7, 2025.
For detailed information, please visit:
https://realid.mvd.newmexico.gov/
FAQ
Q3. Do they sell food items?
A3. Food items will be sold from 8 a.m. to about 12:20 p.m. Cash only. Items range from $3-$5.
Q5. Are there scheduled tours/ceremonies?
A5. There are no scheduled tours or ceremonies. This is a self-guided open house event.
Q6. Can I take pictures?
A6. Photos are allowed at Ground Zero and the McDonald ranch house. Photography is strictly prohibited on any other part of the installation.
Q7. What do I need to do to get on the installation?
A7. A government-issued photo ID is required for everyone 18 years and over and proof of insurance and registration for your vehicle or rental agreement. Please see REAL ID information for documentation to be used in lieu of or with a non-compliant state driver's license.
Foreign nationals must present a valid passport
Q8. Can I bring my firearm?
A8. No weapons are allowed. There is no place to store weapons or firearms. Leave them at home.
Q9. Are pets allowed?
A9. Pets are allowed as long as they are leashed and their waste is picked up and put into a trash receptacle. Pets are not allowed on the shuttle that takes visitors to the ranch house.
Q11. What are the hours for the open house?
A11. The Stallion Gate is open to the public from 8 a.m. to 2 p.m. The site closes promptly at 3:30 p.m.
Q12. How far will I have to walk?
A12. The walk from the parking area to Ground Zero is about 1/8 of a mile.
Q13. What is there to see?
A13. An obelisk at Ground Zero and the McDonald ranch house which is where the plutonium core was assembled.
Q14. Can you accommodate large vehicle (RV’s, Campers, Buses)?
A14. Large vehicles such as recreational vehicles, campers and buses are allowed at the open house. Ample parking is available for these types of vehicles.
Q15. Are there any handicap restrooms?
A15. Handicapped-accessible porta potties are available at the site.
Q16. Are there handicap buses available to visit the McDonald Ranch House?
A16. Unfortunately there are no handicap buses available to visit the McDonald Ranch House. However, architectural drawings and information about the ranch house are available near the entrance to ground zero.
Q17. Do you sell souvenirs/food?
A17. Souvenirs and food are available for sale at the site. Cash only.
Q18. Is there a gas station nearby?
A18. There is no gas station on the missile range. Trinity is in a very remote location, please be sure you have a full tank of gas. We recommend filling up your tank in Socorro, Carrizozo, or Truth or Consequences depending on which direction you are traveling from.
Q19. Is there wheelchair access?
A19. Yes, the site is wheelchair accessible. There is about a 1/4 mile walk to Ground Zero from the parking area. We do not provide transportation The 1/4 mile mile walk and area at GZ are not paved and visitors must be prepared to travel through loose sand and rocks.
Q20. Do I have to register for the Alamogordo caravan?
A20. There is no longer a caravan. As of February 8, 2024 the Alamogordo Caravan will NO longer allow access through the Tularosa Gate.
Q21. Where does the Alamogordo caravan meet?
A21. There is no longer a caravan. As of February 8, 2024 the Alamogordo Caravan will NO longer allow access through the Tularosa Gate. All vehicles must enter the site through the Stallion Gate located off U.S. Highway 380.
Q23. Can I use my GPS device for directions to the site?
A23. Because this is a remote location do not rely on GPS for the location of Stallion Gate. GPS is not always an accurate tool to get to the site. Please follow the directions on the website or look at a traditional map.
Q24. Where is nearest city with hotel accommodations?
A24. The nearest city with hotel accommodations is Socorro, New Mexico. We recommend to book your hotel reservation several months in advance as hotels do book up during open houses.
Q25. Is it harmful to visit Trinity due to radiation?
Radiation levels in the fenced, ground zero area are low. On an average the levels are only 10 times greater than the region´s natural background radiation. A one-hour visit to the inner fenced area will result in a whole body exposure of one-half to one millirem.
Typical radiation exposures for Americans per the American Nuclear Society
- One hour at Trinity Site ground zero = one half mrem
- Radioactivity from air, water and food = about 240 mrem per year
