Petroleum County Moon PhasesUnited StatesMTPetroleum County3:11 am6:18 pmWinnettRise at 3:11 am, Set at 6:18 pm3:11 am6:18 pmWild Horse LakeRise at 3:11 am, Set at 6:18 pmFlatwillowLittle Bear LakePetrolia LakeTeigenWar Horse LakeWar Horse National Wildlife RefugeWild Horse LakeWinnettYellow Water Reservoir