Manhattan Project National Historical Park

The Manhattan Project was a top-secret project focused on building the world's first atomic weapons.
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. The building of atomic weapons began in 1942 in three secret communities across the nation. As World War II waned in 1945, the United States dropped the atomic bombs on Hiroshima and Nagasaki, Japan—forever changing the world.
Map showing location of park.
A woman wearing a campaign hat and green jacket and pants speakers to a group of more than 50 people. Blue sky and brown hills fill the background.
Ranger-led bike ride and hike provide opportunities to enjoy fall weather and learn about local history.
Richland, W.A. – Manhattan Project National Historical Park will host two programs this fall that share Hanford and the Tri-Cities’ role in the Manhattan Project. Ride with a Ranger, offered in partnership with Bike Tri-Cities and the REACH Museum, is scheduled for Saturday, September 28 from 9:30 am to 12:30 pm. Rangers will also lead a history hike up Candy Mountain on Saturday, October 5 from 12:00 pm to 2:30 pm.
Two Military Police sit at a desk talking on phones in a guard house.
Explore the Security and Secrecy of the Manhattan Project in Oak Ridge, August 17 at 11AM ET
Manhattan Project National Historical Park will hold a ranger program, Secrecy, Security and Spies, at the Oak Ridge Turnpike Checking Station (2900 Oak Ridge Turnpike, Oak Ridge, TN 37830) on Saturday, August 17th from 11AM to 12PM ET.
pink clouds brighten the sky behind a very tall and narrow 3-sided shelter with people gathered in front.
Days of Peace and Remembrance: Lights for Peace, Richland WA on August 9, 2024
Richland, W.A. – Manhattan Project National Historical Park will observe the 79th anniversary of the atomic bombings of Japan in the waning days of World War II in 1945 with a one-hour Lights for Peace program on August 9 starting at 8:00 pm PDT at the Fingernail Stage in Howard Amon Park in Richland.
A Park Ranger stands at attention next to the International Friendship Bell.
Days of Peace and Remembrance: Ringing the International Friendship Bell in Oak Ridge, Tennessee on August 6, 2024
Manhattan Project National Historical Park in Oak Ridge, Tennessee is inviting the public to ring the International Friendship Bell at A.K. Bissell Park 79 times at dawn (6:49 am EDT) Tuesday, August 6th to commemorate the number of years since the atomic bombing of Hiroshima.
A three story wooden historic building with wood pillars framing porch, with grassy lawn in front.
Los Alamos site of Manhattan Project National Historical Park hosting Day of Peace and Remembrance in observance of atomic bombings of Japan
The Los Alamos event will take place on Thursday, August 8th at 6:30 p.m. MDT. In collaboration with Friends of MAPR-LA and Los Alamos Arts Council the park will host a viewing of the documentary film Richland followed by a silent luminaria viewing at 8:00 p.m. MDT in the historic Memorial Rose Garden on the grounds of Fuller Lodge.
Historic photo of two men standing next to a mangled piece of metal equipment in the desert.
Photo by Los Alamos National Laboratory
Gray factory building like stacked boxes with single taller smokestack beneath cloudy blue skies.
Photo by NPS
Uniformed park ranger talks animatedly to visitors on a hillside overlooking a sprawling urban area.
Photo by NPS
Two-story white house with two small windows, a single door, and flat roof stands in a gravel lot.
Photo by NPS
Uniformed park ranger points to distance of fountain and trees as visitors sit enraptured.
Photo by NPS
Wooden chair sits amid light blue paneling covered in dials, meters, screens, and buttons.
Photo by NPS
Uniformed park ranger stands with youth along path lined with green broadleaved trees.
Photo by NPS