The Marin Headlands, those dramatic ridges north of the Golden Gate, were formed millions of years ago when the Pacific Ocean broke through the coastal ranges. These rugged escarpments, technically the foothills of Mount Tamalpais, are named (along with the county itself) for legendary Miwok leader Chief Marin. In the 16th century, Spanish, English, and Russian ships found refuge in the lee side of the headlands, in present-day Sausalito. Governments...