Petroleum County Moon PhasesUnited StatesMTPetroleum County5:38 am9:09 pmWinnettSet at 5:38 am, Rise at 9:09 pm5:38 am9:09 pmWild Horse LakeSet at 5:38 am, Rise at 9:09 pmFlatwillowLittle Bear LakePetrolia LakeTeigenWar Horse LakeWar Horse National Wildlife RefugeWild Horse LakeWinnettYellow Water Reservoir