Mary Island, located roughly 25 miles (40 km) south of Ketchikan and about the same distance north of the Canadian border, was named for Admiral John A. Winslow’s daughter, who cruised past the island with her father in 1872 aboard the U.S.S. Sarnac. The U.S.S. Sarnac would later sink in Seymour Narrows, BC after striking Ripple Rock. The U.S. Government established a customs house on the island in 1891, making it the first stopping place for those sailing into Alaska from Canada. The Mary Island Light Station, Alaska’s fourth lighthouse, was built here in 1902, although it was actually lit for the first time on July 15, 1903. By 1961 the light station consisted of a boathouse, oil houses, a cart-house, and several light keepers dwellings. Today all of this is gone except for the lighthouse itself, and it is basically a concrete shell with a solar-powered light. Learn more about this light station and some adventures of the people that worked it here. Click here to download the CoastView app and explore Mary Island.