I was pushing snow berms with a D5 dozer started work about 4:00am it was about 5:13am when I see this red light buy the end of the runway thought it was a snow machine tail light but it was moving slow and smooth like it was flooting I turned off my lights and watched it for about 1 minit cross the frozen lake and shoot up in the sky.it got a little bigger and was in the sky for about 20sec and it had this twinkel and a glow around it,then it disapered for a few sec reapeered a few more sec and it was gone.I called my wife on the phone told her what happened and she told me to go home so i did