The most intimate way to experience the area's good-natured personality is at ocean level. Ideal stop for those heading down to Key West. The water clarity in Marathon is amazing. So fun for the water play. This north Marathon area park is made up of a big group of islands in the Middle Keys. I like this park a lot, and it is right off the highway. The family loves this Beach Park for Snorkeling or swimming, and restrooms. The trail system in a kayak or canoe is a top notch day out.