The Trail of the Cedars in Glacier National Park, an easy paved and boardwalk trail, takes you through a cool, green, drippy canopy of ancient western hemlocks and red cedars, some more than 500 years old and up to 100 feet high and seven feet in diameter. The forest floor is covered in ferns, mosses climb the rocks, and waterfalls in Avalanche Creek roar in the background.