The mountains of southwestern Newfoundland are a part of the Appalachian Mountain system which runs from Newfoundland to northern Alabama. Here is a general definition of the Appalachian Mountains:
The Appalachian Mountains are a major mountain system extending from Newfoundland to Alabama which formed by the collision of ancestral North America and Europe during the Paleozoic Era.
International Appalachian Trail in Newfoundland - in development
Newfoundland Backcountry - Western Newfoundland oriented natural history and hiking information.
Canada's great national 15,000 km [9,000 mile] trail (presently under construction)
enters Newfoundland at Port aux Basques.
Trans Canada Trail