I went to Mt Backer national park with some friends to take picture of Picture Lake and Mt Shuksan. During the shooting late at night, I pointed my camera to the north direction to take pictures for Milky way panorama, I recognized aurora light in my frame. We quickly moved to higher area looking north to take northern light. We saw some color without any strong light rays at first. An hour later, we could not believe our eyes, multiple light rays danced across the horizon.