Do we know which is the world's largest 3D archery course and its stats? Depending on the trail length and the count of targets.
It is/was probably at the 2014 National NASP Tournament – a certified Guinness World Book record – for the world’s largest archery tournament. Held in Louisville’s Exposition Center, 10,800 student-archers from grades 4 through 12 representing 39 states, including Alaska, competed.
Google offers some other suggestions, but this looks like the best candidate. Other then the "Guinness World Book record" I am not finding details on size.