Petroleum County Moon PhasesUnited StatesMTPetroleum County9:05 am10:11 pmWinnettSet at 9:05 am, Rise at 10:11 pm9:05 am10:11 pmWild Horse LakeSet at 9:05 am, Rise at 10:11 pmFlatwillowLittle Bear LakePetrolia LakeTeigenWar Horse LakeWar Horse National Wildlife RefugeWild Horse LakeWinnettYellow Water Reservoir