Turn Point Light, lighthouse in Washington, United States

Turn Point Light stands on the western tip of Stuart Island in San Juan County, Washington, overlooking Haro Strait at the transition to Boundary Pass. The active aid consists of a square white concrete tower about 6 m (20 ft) tall, added in 1936 in front of the original keeper's house, with a gallery and a 12-inch (300 mm) lens. Its focal plane is 13 m (44 ft) above the water, showing a white flash every 2.5 seconds with a nominal range of 8 nautical miles.

The lighthouse was established in 1893 as a simple lantern mounted on a post to help ships navigate the dangerous turn in these waters. Over time, major improvements followed: the light was electrified in 1925, a concrete tower was built in 1936, and the station was automated in 1974, eliminating the need for a permanent keeper.

The name Turn Point comes from the sharp change of course ships make where Haro Strait meets Boundary Pass. Volunteers of the Turn Point Lighthouse Preservation Society lead seasonal guided tours of the 1893 keeper's house, and the fog signal building holds a small museum on the station's history. The oil storage building displays information on the orcas that frequent the waters off the point.

The station is on the western tip of Stuart Island, reached by ferry or private boat and then a hike or bike ride; no road connects it. Seasonal docent tours of the 1893 keeper's house are offered by the Turn Point Lighthouse Preservation Society. The fog signal building holds a small museum, and the oil storage building displays information on the orcas that frequent the waters off the point.

The 1893 Daboll trumpet fog signal was driven by compressed air from pumps powered by two Rider hot-air engines, which proved underpowered and were replaced by internal combustion engines in 1900. The old coal store in the fog signal building later housed the generators that electrified the light in 1925. The fog signal was removed around 2010, but the light still operates.