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My theory summary;
There are 3 mountain top locations forming a triangle in North America where I theorize that Alien visitors have spent some time to study Humans. This visitation and study could have started hundreds or thousands of years ago either before or after Humans settled into this area. These studies could have been conducted by large equipment set up and left in place, from a landed UFO or with smaller hand held devices by Aliens on foot. There is also the possibility of Alien created underground bases at these same locations allowing them to spend more time here while unseen. At different times UFO's may and have been seen at these locations or traveling from one location to the other. I theorize that the 1947 Roswell UFO Incident was a UFO traveling from Blanca Peak, Colorado to Guadalupe Peak, Texas, these being 2 points on the triangle. During this flight an accident occurred creating the debris site on the Foster Ranch near Corona, New Mexico and then it crashed some 30 miles away near Boy Scout Mountain, New Mexico. There are still UFO sightings in this area today.
My best regards,
VARIOUS BOOKS, MAPS AND DOCUMENTS ON NORTH AMERICAN HISTORY.
SOME LOCATIONS AND DETAILS WERE FOUND USING GOOGLE.