Bayside - refers to the Florida Bay side of U.S. Highway 1, generally the northwestern side. As you are traveling U.S. 1 from Miami to Key West, the right side. Term is used interchangeably with “gulfside.”

Gulfside - refers to the Gulf of Mexico side of U.S. Highway 1, generally the northwestern side. Term is used interchangeably with “bayside.”

Mainland - refers to the large, land mass that begins north of mile marker 113. Includes Miami, Washington, D.C., etc.

Mainland Monroe Count - refers to the 1,070,162 square acres (pop. 282) of Monroe County that is part of Florida’s southwest mainland. Mostly includes parts of Everglades National Park and Cape Sable.

Mile Markers (“MM”) - the green markers along U.S. 1 in the Florida Keys. They start at MM127 and end at MM0 in front of the Courthouse in Key West. Directions are frequently given like this: “I’m located at MM25½, oceanside.”

Oceanside - refers to the Atlantic Ocean side of U.S. Highway 1, generally the southeastern side. As you are traveling U.S. 1 from Miami to Key West, the left side.