[3] The light tower is 44 feet (13 m) high, constructed of field stone, and is square on the first level, transitioning to octagonal above.

[4] It is topped with a ten-sided cast iron lantern, accessible via a spiral staircase within the tower.

[4] The need for a lighthouse between Passage Island and Isle Royale was recognized as early as the 1860s, as lake traffic increased dramatically due to the upsurge in mining in the Upper Peninsula.

[4] However, because of Congress's desire to bring political pressure to bear on the Canadian government to force them to build a lighthouse in Lake Erie, the appropriated $18,000 for Pasage Light was not released until 1880.

[4] A fog signal was added in 1884, and in 1894 a new flashing white lens manufactured by Barbier, Benard & Turenne of Paris was installed.