Petroleum County Moon PhasesUnited StatesMTPetroleum County3:29 am5:57 pmWinnettSet at 3:29 am, Rise at 5:57 pm3:29 am5:57 pmWild Horse LakeSet at 3:29 am, Rise at 5:57 pmFlatwillowLittle Bear LakePetrolia LakeTeigenWar Horse LakeWar Horse National Wildlife RefugeWild Horse LakeWinnettYellow Water Reservoir