Petroleum County Sunrise / SunsetUnited StatesMTPetroleum CountySunset8:08 pmWinnettSunset at 8:08 pmSunset8:09 pmWild Horse LakeSunset at 8:09 pmFlatwillowLittle Bear LakePetrolia LakeTeigenWar Horse LakeWar Horse National Wildlife RefugeWild Horse LakeWinnettYellow Water Reservoir