Manhattan Project National Historical Park
New Mexico · Washington · Tennessee
The Manhattan Project is one of the most transformative events of the 20th century. It ushered in the nuclear age with the development of the world’s first atomic bombs. Most of this development took place in three secret communities located in Hanford, WA, Los Alamos, NM and Oak Ridge, TN. Today, you can visit these three sites that make up Manhattan Project National Historical Park.
About Manhattan Project National Historical Park
Manhattan Project National Historical Park is a national historical park located in New Mexico and Washington and Tennessee. The Manhattan Project National Historical Park has units in Hanford, WA, Los Alamos, NM, and Oak Ridge, TN. Check local weather conditions at each unit before you visit.
Manhattan Project National Historical Park is located in three states: New Mexico, Tennessee, and Washington. For more information on accessing each of these three units, visit our Directions & Transportation page.
💰 Entrance Fees & Passes
Entry to Manhattan Project is completely free. There are no general entrance fees or vehicle passes required to access this park unit.
🥾 Things to Do
Manhattan Project National Historical Park offers visitors a diverse selection of outdoor experiences. You can participate in a wide array of activities, most notably Guided Tours, Junior Ranger Program, Park Film, Museum Exhibits, depending on the season and weather conditions. Path options exist for both casual strollers and expert backcountry adventurers.
📦 Recommended Gear & Packing Checklist
Custom items selected for activities at Manhattan Project
📋 Visitor Planning Tips for Manhattan Project
- →Beat the Crowds: Arrive at the main gates or trailheads of Manhattan Project before 8:00 AM. Parking spaces at popular locations fill up extremely fast, especially during warm peak season weekends.
- →Verify Conditions: Weather and trail accessibility inside Manhattan Project can change rapidly. Always verify the latest road conditions and local weather advisories before starting your trek.
- →Altitude & Hydration: The thin air and dry heat in this region will dehydrate you quickly. Pack at least 3 to 4 liters of water per person per day and pack electrolyte replacements.
- →Leave No Trace: Help protect the delicate ecosystems of Manhattan Project. Stay on marked trails, pack out all of your waste, and keep a respectful distance from wildlife.
The Manhattan Project is one of the most transformative events of the 20th century. It ushered in the nuclear age with the development of the world’s first atomic bombs. Most of this development took place in three secret communities located in Hanford, WA, Los Alamos, NM and Oak Ridge, TN. Today, you can visit these three sites that make up Manhattan Project National Historical Park.
Frequently Asked Questions about Manhattan Project
About the Author
James R. Mitchell
Founder & Lead Writer — National Park Data
James has visited all 63 designated US national parks and has been writing about outdoor travel for over 12 years. He spent 8 years as a wilderness guide in the Rocky Mountains before founding National Park Data to help visitors plan better, safer, and more enjoyable park trips.
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