Port Epworth, Nunavut, Canada is the Arctic Ocean release of the Tree River. View is to the north, Plummer's riverside Tree River Lodge is about 5 miles south. Some rivers originating south of the tree line and flowing to the Arctic Ocean have valleys that are noticeably greener than the surrounding tundra. Such as the Coppermine River and the Tree River. Rocky outcrop to the right is a mafic sill of the 723 million year-old Franklin magmatic event.