The newly designated Pacific Northwest Trail is a 1200 mile march from Glacier National Park to the Pacific Ocean (just beyond Olympia National Park), effectively linking the Pacific Crest Trail with the Continental Divide Trail.
Since I just stumbled onto this, I’ll let the official websites explain:
First proposed in the early 1970s, the Pacific Northwest Trail was designated by Congress as one of eleven National Scenic Trails in the Omnibus Public Lands Management Act of 2009. The National Trails System Act calls for these trails to be located to provide for maximum outdoor recreation potential as well as the conservation and enjoyment of the scenic, historic, natural, and cultural resources in the areas through which these trails pass.
This carefully chosen path is high for the views and long on adventure, ranking among the most scenic trails in the world.
It includes the Rocky Mountains, Selkirk Mountains, Pasayten Wilderness, North Cascades, Olympic Mountains, and Wilderness Coast. The trail crosses 3 National Parks and 7 National Forests.