Enriching Uranium in Happy Valley: Guided Ranger Walk at K-25 [Oak Ridge, TN]

Park Event · Manhattan Project National Historical Park, New Mexico, Tennessee · Oct 17, 2026 · 11:00 AM–12:00 PM

The largest plant site of the Manhattan Project, and the war, K-25 helped isolate the crucial uranium-235 from the more abundant uranium-238.

To accomplish that goal, tens of thousands of construction workers relocated to Happy Valley.

Learn more about the accomplishments of those workers, and the sacrifices it took to get there, at a ranger walk along the greenways through the former K-25 site.

Greenway Information

• Distance: 1 mile out and back
• Greenway is asphalt
• No elevation gain

Source: National Park Service (public domain).