Best Marathon Shores vacation rentals by owner, Florida vacation homes for rent by Owner, villas, cabins, cottages, apartments & 1,2,3 & 4 bedroom Vacation condo Rentals in Marathon Shores. No service fee book directly at findamericanrentals.com Marathon Shores offers a fantastic selection of vacation rentals by owner, making it an ideal spot for your next getaway. Nestled in the heart of the Florida Keys, this charming community provides access to stunning beaches, crystal-clear waters, and a range of outdoor activities like sailing, fishing, and diving.