What Castaway Island Preserve Offers

Castaway Island Preserve is a remote, undeveloped barrier island in Florida's Ten Thousand Islands, accessible only by boat. The preserve sits in the Gulf of Mexico off the coast of Collier County, roughly 20 miles south of Naples. It holds shallow flats, mangrove shorelines, and sandy beaches—habitat for redfish, snook, tarpon, and permit in the surrounding waters. The island itself is closed to overnight camping and development; you fish the waters around it as a day trip from the mainland or from a boat anchored offshore.

The appeal lies in the remoteness and the shallow-water fishing. The flats around Castaway Island hold redfish year-round, with the strongest bite from October through April. Snook move into the mangrove edges during cooler months and return to deeper channels in summer. Tarpon show up in spring and early summer, particularly around the full moon. The water is typically 2 to 4 feet deep on the flats, making sight-casting and poling the standard approach.

Access requires a shallow-draft boat—a skiff, flats boat, or kayak. The run from Naples or Everglades City takes 45 minutes to over an hour depending on your starting point and the tide. Tidal flow is strong here; you will need to time your arrival and departure around the tide cycle, and low water can expose sandbars that block direct routes.

Key Takeaways

  • Castaway Island Preserve is reachable only by boat and sits 20 miles offshore in the Ten Thousand Islands, making it a full-day commitment from Naples or Everglades City.
  • Redfish, snook, and tarpon inhabit the shallow flats and mangrove edges around the island, with redfish fishing strongest from October through April.
  • You will need a shallow-draft boat or kayak to reach the preserve and fish the 2- to 4-foot flats; tidal timing is critical for navigation.
  • No overnight camping is permitted on the island itself; plan to fish as a day trip and return before dark.
  • A Florida saltwater fishing license is required, and you must follow current bag limits and size regulations for all species.

Seasons and Best Times to Fish

October through April is peak season for redfish on the flats around Castaway Island. Water temperatures drop into the 70s and 60s, and redfish move shallow to feed. Sight-casting to tailing fish in 1 to 3 feet of water is the primary method. Mornings are typically calmer and offer better visibility for spotting fish.

Snook fishing peaks from November through March, when they concentrate in the mangrove channels and creek mouths near the island. Spring (March through May) brings tarpon to the area, particularly during the full moon phase when tidal movement is strongest. Summer (June through September) is slower for flats fishing; snook retreat to deeper water, and heat and afternoon thunderstorms make conditions less predictable.

Permit are present year-round but are difficult to sight-cast and require patience and precise fly or lure placement. Winter months offer the clearest water and the best chance to spot permit on the flats, though they remain a challenging target even for experienced anglers.

How to Reach Castaway Island Preserve

Most anglers launch from Naples, Everglades City, or Chokoloskee. Naples has multiple public boat ramps and charter services; Everglades City and Chokoloskee are smaller but closer to the Ten Thousand Islands. The run to Castaway Island takes 45 minutes to 90 minutes depending on your starting point and the tide state.

Navigation requires a GPS unit and familiarity with shallow-water running. The route crosses open Gulf water and then enters the shallow island chain. Sandbars shift seasonally and after storms, so a recent chart or local knowledge is valuable. If you do not own a boat, charter captains based in Naples, Everglades City, and Marco Island regularly fish Castaway Island and can handle navigation and tide timing.

Kayak anglers can reach the preserve but should be experienced in open-water paddling and tidal navigation. The paddle from Everglades City or Chokoloskee is long and exposed; wind and tide can make the return trip difficult. Most kayak anglers fish the closer islands and channels rather than making the full run to Castaway Island.

Regulations and Licensing

A Florida saltwater fishing license is required for anyone 16 and older. You can purchase a 3-day, 7-day, or annual license through the Florida Fish and Wildlife Conservation Commission (FWC) website or at tackle shops and sporting goods stores throughout Florida.

Bag limits and size regulations vary by species and change periodically. Redfish have a slot limit (typically 18 to 23 inches); snook have a slot limit as well (typically 28 to 32 inches); tarpon are catch-and-release only in most Florida waters; permit have a bag limit of two per day. Check the current FWC regulations before you fish, as rules are updated regularly and violations carry fines.

Castaway Island Preserve itself is protected land managed by the state. You may not land on the island, camp, or remove anything from it. Fishing the surrounding waters is permitted under standard saltwater regulations.

What Gear and Tackle to Bring

For redfish and snook, a 7- to 9-weight fly rod or a medium-power spinning rod works well. Redfish respond to topwater plugs, soft plastics (3 to 5 inches), and small crankbaits. Snook prefer live baitfish (mullet, pilchards) or large soft plastics (4 to 6 inches). Tarpon require heavier tackle—a 10- to 12-weight fly rod or a medium-heavy spinning rod with 20- to 30-pound braid.

Bring polarized sunglasses for sight-casting; the glare off shallow water is intense, and good glasses make the difference between spotting fish and fishing blind. A push pole or shallow-water anchor helps you position the boat without spooking fish. Waders are optional but useful for wading the flats if the water is cool enough.

Pack plenty of water, sunscreen, and a hat. There is no shade on the open flats, and the sun reflects off the water. Bring a first-aid kit and a VHF radio or cell phone for emergencies; the area is remote, and help is not nearby.

Tides and Water Conditions

Tidal range in the Ten Thousand Islands is typically 2 to 3 feet, but the effect on shallow flats is dramatic. Low tide can expose sandbars and make navigation impossible; high tide floods the flats and can push fish into deeper water. The best fishing window is usually the two hours before and after high tide, when fish move onto the flats to feed.

Water clarity depends on wind and recent rain. Calm conditions produce clear water and excellent sight-casting. Wind stirs up the bottom and reduces visibility. Heavy rain freshens the water and can push fish deeper or into the mangroves. Check the forecast before you commit to the trip; a day with light wind and clear skies is worth waiting for.

Currents run strong through the island channels, particularly on the incoming and outgoing tide. If you are anchored or poling, be aware of the current direction and adjust your position accordingly. Drifting with the current can cover water quickly but requires good boat control.

Practical Logistics and Safety

Plan for a full day. The boat run alone takes 2 to 3 hours round trip, leaving you 4 to 6 hours of fishing time. Depart early in the morning to maximize daylight and to avoid running the open Gulf in fading light. Return well before sunset; running shallow water in the dark is dangerous and illegal without proper lighting.

Fuel consumption is high on the run out; bring extra fuel or plan your trip around fuel availability at Everglades City or Chokoloskee. Weather can change quickly on the Gulf. Check the marine forecast before you leave, and be prepared to cut the trip short if conditions deteriorate.

Tell someone on shore where you are going and when you expect to return. Carry a VHF radio, a cell phone in a waterproof case, and a personal flotation device. The area is remote, and rescue response times can be long. A basic first-aid kit and knowledge of how to handle a grounded boat are practical skills to have.

Frequently Asked Questions

Can I camp on Castaway Island?

No. Castaway Island Preserve is protected land and does not allow overnight camping or landing on the island. You must fish as a day trip and return to the mainland before dark. Nearby islands and mainland campgrounds in Everglades City and Chokoloskee offer overnight options if you want to stay in the area.

What is the best month to fish Castaway Island?

October through December offers the most consistent redfish fishing, cooler water temperatures, and calm weather. January through March remains strong for redfish and adds snook to the mix. Spring (April and May) brings tarpon but can be windier. Summer is slower and hotter, with afternoon thunderstorms common.

Do I need a guide to fish Castaway Island?

A guide is not required, but the remote location and tidal complexity make one valuable if you are unfamiliar with the area. Charter captains based in Naples, Everglades City, and Marco Island know the flats, the tide cycles, and where fish are holding. A guide also handles navigation, allowing you to focus on fishing.

What happens if I run aground on the flats?

Sandbars are common, and running aground is a real possibility. Shallow-draft boats can often be poled off. If you are stuck, do not gun the engine; that can damage the prop and bury the boat deeper. Use a push pole or wait for the tide to rise. Carry a spare prop and basic tools. If you cannot free the boat, call for help on the VHF radio.

Is a Florida saltwater license required if I am fishing from a charter boat?

No. If you are fishing from a licensed charter boat with a captain, you do not need your own license. The charter captain holds the license that covers all passengers. If you are fishing from your own boat or a private boat, you must have a license.