Where does the timberline run across the Northwest Territories?

The timberline in the Northwest Territories runs in a southeastward direction, beginning near the Mackenzie River delta on the Arctic Ocean and extending toward northwestern Manitoba. Throughout this path, the line remains just west of—and roughly parallel to—the border with Nunavut.12

This boundary serves as a significant ecological transition:
* Southwest of the line: The landscape features the northernmost reaches of the Canadian boreal forest, which extends westward to the mountain ranges bordering Yukon.1
* North and east of the line: The terrain transitions into the relatively barren grounds of the Arctic, characterized by tundra vegetation and the rocky, ancient landscape of the Canadian Shield.1