Event date: June 13, 2026 Event Time: 11:00 AM - 12:00 PMLocation: 200 Heritage Center BlvdOak Ridge, TN 37830Description: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. Distance: 1 mile out and back. Greenway is asphalt. No elevation gain.