Adapted from A Walk Along Lands End: Discovering California's Living Coast (HarperCollins) by John McKinney. (In this excerpt, we join John in far northern California, some 1,400 miles into his 1,600-mile solo trek up the California coast.)

It doesn't get any wilder than this. California has a very long coastline, and millions of acres of wilderness, but it has only one wilderness coast. The Lost Coast.