U.S. 1 (or the Overseas Highway) crosses Park Key at about mile marker 18, between Lower Sugarloaf Key and Sugarloaf Key in the middle of Upper Sugarloaf Sound.
U.S. 1 (or the Overseas Highway) passes through Park Key at a specific location, approximately mile marker 18, connecting Lower Sugarloaf Key and Sugarloaf Key in the middle of Upper Sugarloaf Sound.