Notice Not affiliated with the Master Mariners Benevolent Association (MMBA) or any successor organization. v.2026.05
General Overview
Facility 🚤 Full Service Marina Est. Slips ~80 Water Ocean/Bay Est. Parking ~120 spaces Lot Size Medium (50–150) Lot Type Surface Confidence High

Medium-sized marina with extensive wet slips surrounded by mangroves and RV parking areas featuring numerous vehicles.

Aerial view of 15th Street Marina Marathon (at Boot Key Harbor)
Atlantic Coast

15th Street Marina Marathon (at Boot Key Harbor)

Marathon, FL

The 15th Street Marina Marathon is located in Boot Key Harbor, a protected natural harbor in Marathon, Florida, which lies in the middle Florida Keys along the Gulf Coast of the United States, offering easy access to the Gulf of Mexico's calm waters and nearby Atlantic Ocean passages. This marina primarily serves recreational boating and sailing activities, catering to enthusiasts exploring the region's abundant marine life, coral reefs, and fishing spots in the subtropical waters of the Florida Keys. It provides a strategic hub for boaters navigating the intricate waterways of the Keys, blending Gulf Coast tranquility with the adventure of tropical sailing.

★★★★★ 4.5 (11 reviews on Google) View on Google Maps ↗
Address 890 15th Street Ocean, Marathon, FL 33050, USA
Capacity ~80 slips
Hours
Monday: 8:00 AM – 5:00 PM
Tuesday: 8:00 AM – 5:00 PM
Wednesday: 8:00 AM – 5:00 PM
Thursday: 8:00 AM – 5:00 PM
Friday: 8:00 AM – 5:00 PM
Saturday: Closed
Sunday: Closed
Coordinates 24.7063, -81.1082

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Marina Parking & Access Control

Marinas typically need to separate slip holder parking from day-visitor parking, trailer areas, launch ramps, and secure dock access points. Modern facilities use barrier gate systems to enforce these zones automatically — allowing permitted vehicles through via transponder or keycard while logging all access events.