I heard a small engine plane, which caused me to look up. The plane sounded close, the usual altitude and familiar to me as a single engine prop. I turned to my left looking up, but the sound was behind me, slightly West. then I turned around almost 180 degrees and looked up a bit higher. I saw a group of objects flying at a very high altitude (very small, but were shaped - not just little dots), in relatively uniform triangle formation.The individual objects sort of shined, or 'glinted' - reflecting random bright silver/white flashes. I heard no usual jet like sound. I blinked my eyes, still there - grabbed my glasses to see if it was just an anomaly in my vision. I tried to take a picture with my old cell phone, but not sure I could capture anything (will review). They continued in the same direction, very fast but it was apparent to me that these were multiple objects not birds, and sort of moved about loosely within the triangular pattern.My first impression was "military, new aircraft test flight...", but then I couldn't help thinking to myself this is my first apparently legitimate UFO sighting!