Massive string of slow/standard-moving lights in single-file line consumes entire sky from the lead light to final light in string

UFO Sighting in Evergreen, CO – west of Denver – on Feb 11, 2021 5:55am In the dark early morning sky, a slow moving series of white lights all traveling in one line across the entire sky.  The spacing was not exact, but the trajectory appeared to be exact, in order to create the vast single-file line.
The movement was roughly North-South or NW-SE and the front leading light of the impossibly long line was about 5:55 and lasted for nearly 10 minutes until tail end of the line crossed over my home on Stanley Mountain.
 Military aircraft has formerly been sighted many times since living here adjacent to a canyon between Bear Mountain and Stanley Mountain.  It is a joy when the fighter jets screech through the canyon at about eye level for me (8k feet).  Whenever they are sighted the trajectory is similar NW-SE (N-S) but tremendously different height.
 Whether military or not, the path is similar – coming from the mountains (NW) heading out of the deep mountains, as I live on edge of the front range, and the line moved toward the edge of the flat land and Colorado Springs (South).   Air Force activity ?  Photo image and video attempts did not capture/show any stars, or the vast moving string of lights.