Duck Key is a small, secluded island midway between Key Largo and Key West. The island includes Hawk's Cay Resort & Village and residential Duck Key real estate. Arched bridges link the canals of the island, which is surrounded by aquamarine water. Duck Key real estate includes waterfront single-family homes, condos and buildable vacant lots. Hawk's Cay Resort's Dolphin Connection program offers resort guests the opportunity to swim with dolphins in an ocean-fed saltwater lagoon. Duck Key is located at Mile Marker 61 just north of Marathon. Vacation rentals are limited to 28 days for single family homes in Duck Key. Hawk's Cay does offer nightly and weekly accommodations.