Tongass Passage is entered between Haystack Island and Island Point, the SE extremity of Sitklan Island (54°45'N., 130°40'W.). It is deep with steep shores and has a least width of 0.6 mile. Sitklan Passage lies at the N end of Tongass Passage and N of Sitklan Island. It is deep and narrow with steep wooded shores. This passage forms the W approach to Port Tongass. Tongass Passage connects with Pearse Canal at Bartlett Point, the W extremity of Wales Island.

Location