The concept of a "dark sky park" is relatively new. There are a few criteria that go into whether or not a place may be eligible. Basically there can be little to no light pollution and the lights within the park must face down only and be on motion sensors. This makes for a great place to capture the milky way. On this night, I waited until about 03:30 because the moon set just a short while before that time.
natural bridges national monumentbridgesmilky waystarnight