Just east of Thunder Bay on Lake Superior's northern shore, the volcanic Black Bay Peninsula separates Black Bay and Nipigon Bay and consists of over 300 distinct lava flows. Porphyry Island, the last in a chain of islands that stretch southwest from the peninsula, is named for the island's igneous rock, known as porphyry, that contains quartz and feldspar crystals...
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Visitor Info
Porphyry Point Lighthouse is best seen from the water. Great Lakes Lighthouse Keepers Association occasionally offers cruises to Isle Royale that may pass by this lighthouse. The lighthouse is owned by the Canadian Coast Guard. Grounds open, tower closed.