Upper Harbor Wildlife Management Area

Upper Harbor Key is a mangrove island approximately 22 miles northwest of Marathon that is surrounded by flats but is accessible at high tide. The island is used by various bird species including ospreys (Pandion haliaetus), frigatebirds (Fregata magnificens), double-crested cormorants (Phalacrocorax auritus), and wading birds.

A 300-foot no-access buffer zone surrounds the island.

Special regulations apply here. Learn more about what activities are allowed in this type of zone.

A summary of all sanctuary regulations is available online. For the full text of sanctuary regulations, see 15 CFR 922 Subpart P.