Personal description: pharmacist. retired air force, rank of colonel. Walking the dog with my wife at twilight with a clear sky, an extremely fast moving, brilliantly illuminated bright red square UFO flew overhead approximately 1,000 feet altitude from north to south parallel to state highway 93. No sound. Size was approximately that of an aspirin held at arms length. UFO abruptly stopped without slowing and hovered over the City of Golden, Colorado for about one minute, then accelerated extremely fast straight up and disappeared. I attended the air force navigation training school at Mather AFB, California. Never saw anything like it in all the hours of flight training. mufon cms# 114522 Golden Colorado 4/02/21 Region has had 2,678 Reported UFO Sightings to date.