Calf Island /ˈkæf/ is a natural Michigan island in the Detroit River. The island has a surface elevation of 571 feet (174 m). It is located in the Trenton Channel about 1,000 feet (304 m) west of the southern tip of Grosse Ile and Swan Island, and Hamburg Island is just to the northwest. The 7-acre (2.8 ha) island is administered locally by Grosse Ile Township.Added in 2002, Calf Island was one of the newer additions to the Detroit River International Wildlife Refuge.
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