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© 2026 DockOnly™. All rights reserved.

DockOnly™ and Dock Score™ are trademarks of Blue Mar Real Estate Group Inc.

Blue Mar Real Estate Group Inc., Licensed Florida Real Estate Broker

Blue Mar Real Estate Group Inc.

Licensed Florida Real Estate Broker · DBPR License CQ1018554

4000 Ponce De Leon Blvd, Suite 470, Coral Gables, FL 33146

[email protected]

Listing data is provided by participating Multiple Listing Services and is deemed reliable but not guaranteed. Each listing's MLS source and its required disclosures appear with that listing. Dock Score™ is a DockOnly.com rating and is not provided by or affiliated with any MLS or listing broker. NOAA chart data is public domain and for reference only, not for navigation. Full MLS Compliance

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+10

6500-6600 Overseas Highway

Marathon, FL, 33050

Active

$9,500,000

6500-6600 Overseas Highway

Marathon, FL, 33050

Active

$9,500,000

6

Bedrooms

11

Bathrooms

10,852 sqft

Living Area

1967

Year Built

$9,500,000Tour the dockSchedule a Showing
Navigation note: Navigation routes show the shortest mapped path to open water. A vessel taller than the binding bridge clearance may still reach open water via a longer alternate route that we don't currently map. Verify navigability with a local captain or surveyor before relying on it.

168,141

Lot Size (sqft)

748

Days on Market

Dock Score™

DockOnly
79
Good

What shaped this score

✓Bay
✓Dock present
✓Bridge-free to bay & ocean
✓Fits boats up to ~100ft+ (est.)
·Draft not independently verified

DockOnly.com rating, not provided by the MLS or listing broker.

Dock & Water AccessMLS

Bay FrontGulf FrontOpen Water

AI Aerial Imagery Detection

Dock DetectedSeawall Detected

Detected by AI from open-source aerial mapping imagery and may not reflect current conditions. This information was not provided by the MLS or listing broker. Always verify dock infrastructure with the listing agent.

Navigation RouteDockOnly

Data sources: SFWMD AHED waterway polygons · FHWA National Bridge Inventory 2024 · Not provided by the MLS or listing broker.

Description

Casa Mañana Shores, located in the heart of Marathon, is a developer's dream or a private owner's potential paradise. This secured gulf front estate offers 3.86 acres of land and is surrounded by an eight foot concrete wall with three gated entrances. The property boasts approximately 540 linear feet of Highway frontage and 695 linear feet of water frontage. It offers 218 feet of concrete seawall, including a cut-in protected boat slip. There is even room for a helicopter landing pad to be installed. This unique property is zoned mixed-use commercial and comes with one commercial transferable building right. It is currently a private residence with a separate garage and workshop. The 10,852 square foot mansion is solid concrete construction. It has ten bedrooms, six and a half bathrooms, a sauna, game room and great room. Repairs are needed, and the interior needs significant updating. An attached partially screened enclosure holds an impressive 12 ft deep swimming pool that measures 25 x 50 ft. The garage/workshop is a separate structure with two rooms with a mini split air conditioner. The existing structures could be demolished for those with a vision, leaving you with a 3.86 acre blank canvas in the center of town. Its versatile zoning designation offers multiple possibilities for residential and/or commercial use. Over the years it has previously housed a motel with a marina, a 19-unit trailer park, and a restaurant. This property presents the opportunity to create the ultimate secluded retreat of your dreams!

Schedule a Showing

See the property and tour the dock. A licensed waterfront specialist will arrange your private showing.

Select a date

Location

Marathon, FL, 33050

No price history available for this property.

Displayed by Blue Mar Real Estate Group Inc., Licensed Florida Real Estate Broker (DBPR CQ1018554) · [email protected]

Listing courtesy of Ocean Sotheby's International via Florida Keys MLS

Last updated: 6/9/2026

© 2026 Florida Keys Board of REALTORS®, Inc. All rights reserved. The data relating to real estate for sale on this website comes in part from the Internet Data Exchange (IDX) program of the Florida Keys Board of REALTORS®. Information is deemed reliable but not guaranteed and should be independently verified. All properties are subject to prior sale, change, or withdrawal.

IDX information is provided exclusively for consumers' personal, non-commercial use. It may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.

Dock Score™

DockOnly
79
Good

What shaped this score

✓Bay
✓Dock present
✓Bridge-free to bay & ocean
✓Fits boats up to ~100ft+ (est.)
·Draft not independently verified

DockOnly.com rating, not provided by the MLS or listing broker.

Nearest Bridge Clearances

Florida Keys, critical for tall/large vessels

No bridge data available for this location.
FEMA Flood Zone AE
BFE: 9ft

Special Flood Hazard Area

View FEMA Flood Map →
Loading nearby marinas…
Loading nearby sandbars…

Mortgage Calculator

Estimate your monthly payment for this waterfront property

20%

$1,900,000 down

%
Principal & Interest$49,293/mo
Property Tax (est. ~1.2%, varies by county)$9,500/mo
Home Insurance (est.)$250/mo
Total Monthly Payment$59,043
Loan Amount: $7,600,000Rate: 6.75%
Get Pre-Qualified

Estimated payments only. Actual rates and terms may vary.

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