If you can date the photo to circa 1922, then I would ask:
1. How many USMC bases in the continental USA existed in 1922? What were the geographic locations of same? By process of elimination, eliminate those bases that are known to not fit the profile of the photo (topography, flora, etc...)
2. How many 1,000 yard military rifle ranges existed at that time? Cross reference against #1.
That should narrow the suspects to less than 10, maybe less than 5 locations that might fit the photo.
My .02