Positioned just off the coast of Marathon, East Sister Rock Island is a rare private sanctuary wrapped in vibrant turquoise waters—accessible by boat or via a private, on-island helipad has hit the market for $16 million.
A once in a generation opportunity to own a legacy property, the island spans approximately 6.5 total acres—including 5.8 acres of private surrounding seabed– offering an extraordinary aquatic playground for snorkeling, swimming, kayaking, paddleboarding, fishing, and exploring the pristine waters of the Florida Keys.
At the island's heart is an updated 3-bedroom, 2-bath main residence alongside a separate guest house, offering over 5,000 square feet of refined living space. The interior highlights a chef-inspired kitchen adorned with premium countertops and contemporary finishes, while a 12-foot-wide wraparound veranda delivers sweeping, panoramic ocean vistas, breathtaking Atlantic sunrises, and iconic Keys sunsets.
Resort-style outdoor living features a waterfront pool and spa, lush tropical landscaping, dedicated alfresco lounging and dining venues, helipad, and a 100-foot deep-water dock accommodating multiple vessels.
Engineered to be eco-friendly and fully self-sufficient, East Sister Rock is powered by solar and wind systems with battery storage, a backup generator, a desalination system, and ample freshwater cistern capacity. The offering includes 99 E Ocean Drive on the mainland which includes private dock space.
1 East Sister Rock Island in Marathon, Florida Keys is listed for $16 million by Vladimir Rochebrun & Aaron Rosenthal with The Chad Carroll Group at Compass.
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Positioned just off the coast of Marathon, East Sister Rock Island is a rare private sanctuary wrapped in vibrant turquoise waters—accessible by boat or via a private, on-island helipad has hit the market for $16 million. A once in a generation opportunity to own a legacy property, the island spans approximately 6.5 total acres—including 5.8 acres of private surrounding seabed– offering an extraordinary aquatic playground.