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Property Detail

Private Island ~Oceanfront-Fishing-Diving~ FL Keys

Marathon, FL

Escape to your exclusive retreat on EAST SISTER ROCK ISLAND, just a stone's throw from the vibrant City of Marathon in the Florida Keys! This hidden gem boasts 3 bedrooms, two baths, and a charming 1/1 Guest House (available for an extra charge). Lounge on the 12 ft wrap-around veranda that offers breathtaking views of the surrounding paradise. Plus, your adventure begins with a 21 ft. Carolina Skiff, providing seamless transportation to and from your private oasis. Get ready for an UNRIVALED KITEBOARDING/DIVING/FISHING/SNORKELING DESTINATION, where relaxation meets adventure! Upon Arrival:...

  • 8 Guests
  • 3 Bedrooms
  • 2 Bathrooms
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East Sister Rock Island

 

East Sister Rock Island has been a part of the Williford family legacy for over 30 years. Our story began with a dream — our father, Robert Williford, had always envisioned building a fully self-sufficient, off-grid sanctuary where he could fly in by helicopter and escape the world on his own terms.

When he discovered East Sister Rock, it was love at first sight. He purchased the island in 1995 and, by 1997, transformed it into a sustainable retreat powered by solar and wind energy, complete with a custom-designed rainwater catchment system.

Originally our private weekend getaway, the island became too special not to share. Since the early 2000s, we’ve opened our doors to guests from around the world, offering East Sister Rock as a one-of-a-kind vacation rental and event venue.

Today, we continue to operate the island as a family-run escape — staying true to our roots while sharing the magic of this off-grid paradise with those seeking privacy, adventure, and unforgettable memories.

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Frequently Asked Questions

Ground rules for guests

We require everyone to stick to these simple rules for being a great guest:

  • Treat your Host’s home like your own
  • Follow the Host’s standard house rules
  • Cleanliness: Guests should not leave the listing in a state that requires excessive or deep cleaning (moldy dishes, soiled carpets, stains from pets, etc.). Cleaning fees set by Hosts are only meant to cover the cost of standard cleaning between reservations (laundry, vacuuming, etc.).
  • Litter: Guests should put their trash in designated trash receptacles and be mindful of excessive amounts of trash.
  • Damage: Where guests cause damage that is beyond normal wear and tear, we expect guests to inform Hosts of the damage as soon as possible and work with the Host to find a reasonable solution. Guests are expected to pay reasonable requests for reimbursement if they’re responsible for damage, missing items, or unexpected cleaning costs.
  • Accidents are rare, but they happen. If you, someone you invite, or a pet are responsible for damage during a stay, let your Host know right away.
  • Your Host can send you a reimbursement request to cover the cost of the damage, and you’ll have 24 hours to respond.

Follow the Host's standard house rules

  • Approved guests: Guests should respect the approved number of guests and should ask their Host if they're unsure about the rules for visitors. Disruptive gatherings are always prohibited.
  • Check-in time: Guests should respect their Host’s check-in window and should not check in before or after the designated window without prior approval from the Host.
  • Checkout time: Guests should complete checkout, including key return, by the designated checkout time indicated on the reservation, and should not leave belongings at the listing past the designated checkout time for storage or later pickup without prior approval from the Host.
  • Smoking: Guests should not smoke inside a listing unless they are allowed to do so by the Host. This includes the use of tobacco, cannabis, e-cigarettes, etc.
  • Approvals for pets: Guests should not bring any pets inside a listing that is designated as “no pets” in the house rules, bring more pets than are approved into a listing, or fail to inform the Host about any pets brought inside the listing. Note that service animals are not considered pets.
  • Noise: Guests should respect designated quiet hours and should not disturb the surrounding community with a disruptive level of noise (loud music, shouting, slamming doors, etc.).
  • Commercial film and photography: Guests should not participate in film or photography that is intended for commercial use or profit, without documented permission from the Host.

What do you do if you break or damage something during your stay?

You should let your Host know right away if you break or damage something during your stay. The best way to do this is by sending them a message through the website or app.

If you can provide photos, that’s great, too.

Being upfront about damage gives your Host as much time as possible to fix it before their next guest arrives. It also gives you and your Host a chance to find a resolution.

You should let your Host know right away if you break or damage something during your stay. The best way to do this is by sending them a message through the website or app. If you can provide photos, that’s great, too. Being upfront about damage gives your Host as much time as possible to fix it before their next guest arrives. It also gives you and your Host a chance to find a resolution.

Late checkouts are not allowed.

Early check-ins need to be requested the day of check-in and are not guaranteed. If we can offer an early check-in, it is free of charge after 2pm or $50 for 12 - 2 o'clock.

About Owner

Vast outdoor spaces, including a wrap-around porch, allow guests to embrace the island's natural beauty. Unique amenities such as a 100-foot private boat dock, helicopter launch pad, pool, billiards table, and access to a reef fishing paradise elevate the experience. With a breathtaking 360-degree ocean view, guests are treated to unparalleled vistas. Nearby attractions like the renowned Sombrero Reef, make this property an ideal retreat for adventure seekers in the Florida Keys.

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