Large, disc shaped, brightly lit, silent craft hovered approximately 100' above our car.

On the morning of September 04, 2023, at approximately 2:30 in the morning, my passenger and me saw a brightly lit object traveling towards us at approximately 100' as we drove East on Prospect Avenue in our car, away from the Estes Park Medical Center. Given our proximity to the hospital, we assumed it was the medical helicopter with its landing light illuminated preparing to land there. However, as the craft approached us, we realized that it was much too large to be a helicopter, it was disc shaped with bright, white, hazy lights around its perimeter, and it was completely silent. When the object and our vehicle caught up with one another, we came to a complete stop as the flying object also stopped and hovered silently above us at approximately 100'. It was a very large disc that was very brightly illuminated with white lights, and it hovered completely silently. After watching the object for approximately five minutes, we became a little concerned as to its intentions, so we decided to depart, and as we did, it also silently and rapidly flew off. As a private pilot myself, I am certain that it was not a craft developed or operated by humans.