You have surfed to South Padre Island, the tropical tip of Texas, for a tour of the Lone Star State's only true tropical isle. South Padre Island is a coastal resort town on the Gulf of Mexico with five miles of seashore fun, shopping, dining and water activities. South Padre Island, bordered by the Laguna Madre bay, is also ecologically significant with 34 miles of sand dunes, water birds, shrimp, and the best deep-sea fishing in Texas.