A gorgeous shot of the full moon at City of Rocks National Reserve in Idaho This photo of the moon was taken yesterday morning as it was setting behind the park’s Graham Creek Canyon. Tonight’s full moon is called the blue moon – a rare occurrence when two full moons take place in a month. Tonight’s blue moon will be the first since August 2012 and we will not see another until January of 2018. Hope you get a chance to see it! National Park Service photo.