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Passage Key Visitor’s Guide: The Disappearing Island, It's History & How to Get There
Passage Key is likely the most secluded of all barrier islands, This isolated island sits at mouth of Tampa Bay like its sister islands of Egmont Key, and Shell Key President Theodore Roosevelt established Passage Key in 1905 as one of the first areas to be protected as a National Wildlife Refuge, preserving nesting colonies of native seabirds and wading birds. In the early 1900's Passage Key was a 60-acre mangrove island with a freshwater lake. Today, Passage Key is a low-lying sandbar that fluctuates in size, and is found often completely below water during high tide.. See all barrier islands of St Pete.
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Passage Key Quick Visitor Guide
Topic Quick Answer
Location Mouth of Tampa Bay
Access Private Boat or Charter only (no ferries)
Travel Time About 45–55 minutes
Best Activities Relaxation, wildlife viewing
Facilities No restrooms, restaurant, retail
Best Time to Visit Spring through fall
Like its big sister barrier island to the north, Passage Key is also part of the National Wildlife Refuge system. Passage Key was one of the earliest entries into the NWR registry, however, as Egmont Key was not designated into the NWR system until 1974. Passage Key is certainly the most geologically fragile of the barrier islands, having lost 99% of its original 65 acres in just the last few decades.
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Passage Key is far more removed than the other barrier islands of Tampa Bay, and as a result, its waters have better clarity than the others islands. It sits miles away from any population center, so it's well isolated from the effects of mankind.
Visitors come to Passage Key looking to get away from the crowds. Some are drawn by the crystal-clear water and quiet setting far removed from the crowds of usual tourist centers.
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The journey to Passage Key from St Pete skirts the Gulf in a southward direction. The views of wildlife, and passing by the Egmont lighthouse gives visitors a chance to learn about the local history and ecosystem before arriving at the island itself. Once at Passage Key, boats will anchor in 2ft of water, and the relaxation begins. And so does the Bohemian vibe.
This visitor’s guide will help you understand everything you need to know before visiting Passage Key.
Where Is Passage Key?
Located at the Mouth of Tampa Bay
Passage Key sits at the mouth of Tampa Bay where the bay meets the Gulf of Mexico. The little island forms a natural barrier between the open Gulf waters and the Southwest Channel leading into Tampa Bay.
The island is part of Florida’s chain of barrier islands, but unlike the other islands it has been largely washed away, leaving an enormous sandbar.
Map of Passage Key and Surrounding Waters
Passage Key is located at the entrance to Tampa Bay about 11 miles from St. Pete Beach and a short boat ride from Fort DeSoto Park.
Distance from St. Pete Beach, Fort De Soto, and Anna Maria Island
Passage Key is conveniently located for visitors staying throughout the Tampa Bay area. From Anna Maria Island, Passage Key is only a short boat ride away across the Southwest Channel. St. Pete Beach and Tierra Verde are also common departure points for tours and private boats heading to the island. Tierra Verde is host to some of the most highly rated private charters going to Passage Key.
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Anna Maria Island lies just across the mouth of Tampa Bay to the south, making Passage Key a popular destination for boaters from both Pinellas and Manatee counties. Because the island is centrally located between these areas, it attracts visitors from a wide portion of Florida’s Gulf Coast.
The relatively short distance from shore makes Passage Key accessible while still maintaining its feeling of isolation.
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Passage Key Travel Times Table
Departure Area Distance Boat Travel Time
Tierra Verde ~9 miles 20–25 min
Fort De Soto ~5 miles 15–20 min
St. Pete Beach ~11 miles 25–30 min
Anna Maria Island ~3 miles 15–30 min
Passage Key Overview
Passage Key is a dynamic, low-lying sandbar and National Wildlife Refuge at the mouth of Tampa Bay, Florida, known for its clear, shallow waters popular with boaters. Established in 1905, it is a protected nesting site for birds. It is also very widely known for being a popular, clothing-optional anchorage,
Why Visit Passage Key?
Activities at Passage Key are centered on the water, as the land itself is a federally protected bird sanctuary and closed to the public. Visitors must remain in the water at all times—typically at least ankle-deep—to avoid disturbing nesting habitats.
Pristine Waters
One of the biggest reasons people visit Passage Key to experience its crystal-clear water, and shallow sandbars. Like Egmont Key, it is very remote and distant from the metro areas of St Pete and Tampa. This proximity from populated areas allows the waters to feel more like the Florida Keys, rather than a crowded beach. Accessible only by boat, it offers a tranquil escape.​
Adult Atmosphere
The other very unique feature of Passage Key is its unofficial status as a clothing-optional area with the locals. Being remote as it is, there are no crowds, and the visitors that make it out there are usually intent on having a more adult experience. It is one of the region's few "quasi-legal" nudist hangouts for the naturist culture. Sunbathing au-naturel is the norm at Passage Key.
Snorkeling and Marine Life
The waters surrounding Passage Key are crystal clear, and very shallow. This is a great way to get a look at the rays, manatees, and occasional sharks that make their way through the area. It's a great location to snorkel, and paddleboarding as well. Of course, there is a good bit of naked snorkeling and paddleboarding that goes on.
Passage Key History
Early History
Centuries ago, Passage Key was a 65 -acre lush mangrove island with a freshwater lake. Through both Spanish and British exploration, the island was known by many names over centuries, including Isla de San Francisco y Leon and Burnaby Island. It was renamed Cayo del Pasaje (spanish for Passage Key) by the Spanish in 1783. The island was teeming with laughing gulls, royal terns, black skimmers, sandwich terns, brown pelicans and oystercatchers.
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In the early 1830s, Captain William Bunce from Baltimore operated a commercial fishing camp on the island. (Captain Bunce was prominent in local history as one of the first residents of the island of Tierra Verde. The Tampa Bay waterway that separates Fort DeSoto from Shell Key, Bunce's Pass, was in fact named after Captain William Bunce.). ​
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The island was later a haven for refugees seeking safety from marauding Indian war parties. The fresh water lake, probably spring fed, was a watering station for coastal voyagers. In 1836, the U.S. Schooner Grampus and Revenue Cutters Washington and Jefferson anchored close ashore while their guns and shore parties protected settlers from the Indians.
Storms and Erosion
In 1921, on October 25-26, a storm surge caused by a catastrophic Category 3 hurricane destroyed the island’s freshwater lake and most of its vegetation, beginning its transition into a sandbar. This storm is known as the infamous 1921 Tarpon Springs hurricane. Since that time, the size of the tiny island has fluctuated over the following decades. The island grew for a time until the 2005 hurricane season, and is now a shifting sandbar. me. It's easy.
World War II
Between 1943 and 1945, the military used Passage Key and the surrounding waters as a bombing and gunnery range for strafing and skip bombing practice. While cleanup efforts have been conducted, officials still advise caution regarding potential unexploded ordnance. Nothing has been seen for years by the locals who visit the island.
Passage Key National Wildlife Refuge
In 1905, President Theodore Roosevelt designated Passage Key as a National Wildlife Refuge under a new system created by Roosevelt. It was meant to preserve nesting colonies of native seabirds and wading birds. Captain Asa N. Pillsbury Jr. served as the resident warden until 1921, reporting over 100 bird species living on the then-mangrove-covered island. Captain Pillsbury helped protect the island from feather poachers who were intent on violating the refuge.
In 1970, Passage Key received further federal protection as a designated National Wilderness Area to protect native birds and serve as a breeding ground for them. ​Currently, Passage Key NWR is one of the three 'Tampa Bay Refuges', and is administered as a part of the Crystal River National Wildlife Refuge Complex. The complex manages the Pinellas National Wildlife Refuge, Passage Key National Wildlife Refuge, the Egmont Key National Wildlife Refuge, and the Crystal River National Wildlife Refuge
Things to Do on Passage Key
Snorkeling at Passage Key
Snorkeling is one of the most popular activities on the island. The area is famous for some of the clearest turquoise water in Florida, often compared to the Bahamas. You can explore shallow underwater ecosystems to see colorful fish, crabs, and sea urchins. The white sandy bottom is a prime spot for finding unique seashells and large sand dollars. Shelling at the waterline here is considered world-class by frequent visitors.
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Sunbathing and Beach Time
Passage Key is a "boaters haven", and is where they go for socializing and relaxation: The culture among the boaters is markedly free-spirited, and clearly an adult environment. It is well known as a naturist hangout, and not suited for families that object to the naturist concept. To that end, naked paddleboarding is very popular at Passage Key.
Wildlife Watching and Photography
As a National Wildlife Refuge, it is a premier site for birdwatching. You can see over 50 species, including Royal Terns, Black Skimmers, and Laughing Gulls. Dolphins and manatees are also frequently spotted in the surrounding shallow flats.​
When Is the Best Time to Visit Passage Key?
Given the mild winters in the St Pete area, Passage Key can be visited throughout the year, including the winter months. The temperature of the Gulf waters almost always stay above 60 degrees throughout the year. Still, the winter months do bring lower tide levels, and conditions on the water may vary depending on the season, weather, and tides.
Seasonal Weather and Water Conditions
Spring and fall often provide some of the best water clarity and color, and also the most comfortable conditions for exploring the area. In addition, the mild temperatures and humidity, and calmer waters also add to the comfort. Summer offers very warm waters, and great wildlife watching. Winter months can still provide beautiful days on the water.
Best Times for Wildlife Sightings
Dolphins and birds can be seen year-round around Passage Key, though wildlife is certainly more active during calmer morning hours. Many visitors enjoy early boat tours or kayak trips for the best chances of spotting marine life. The manatees are gone for the winter months, but the white pelicans come in from the Great Lakes for the winter. Manatees return around the April timeframe.
Tide and Water Conditions
The water at Passage Key generally has the best color and clarity in the region, with a brilliant turquoise color. The waters at Passage Key often resemble the Florida Keys rather than the typical Gulf Coast. However, its position at the edge of the Gulf means there is no protection from heavy seas, so planning ahead is important.
What to Bring to Passage Key
Passage Key is remote and uninhabited, but it is also not quite an island, and you must remain in ankle deep water. So you must pack as if you are going off-grid.
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Pack more water than you think you need, as the Florida heat will dehydrate you quickly.
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Pack a cooler with a full lunch and snacks.
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Inflatable water hammocks and floats are perfect at Passage Key, and highly recommended.
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As always in Florida, bring reef-safe sunscreen, and a wide-brimmed hat.
Passage Key Rules and Guidelines
Passage Key is a particularly fragile ecosystem, and also a US Wildlife Refuge. Enforcement is strict, and enforced regulations are meant to protect its ecosystem. Key rules include
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No alcohol or pets allowed
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Prohibition kites and drones.
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Traversing the dry sandbar is prohibited, and you must stay in ankle deep at at a minimum.
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Violators of these rules gain the unwanted attention of Federal Wildlife Officers, or Florida Fish and Wildlife Agents, or both.
Is Passage Key Great for Families?
Passage Key might not be the best option for families. Without a beach to land on, there are less options to keep youngsters entertained. Whether it is "great" for visiting families also depends on one's comfort level with social nudity and preparedness for a remote environment.
Comparison: Passage Key vs. Family Alternatives
For a more traditional family day on the water, consider the following alternatives.
Feature Passage Key Egmont Key Shell Key
Atmosphere Clothing-optional, Historical, educational, Secluded, great for
adult social scene. ruins to explore. shelling and camping.
Nudity Very common Strictly prohibited Strictly prohibited.
(70%+ most days).
Land Access Prohibited Permitted Permitted
(Must stay in water) (beaches and forts). (beaches).
Best For Socializing, clear History lovers, Nature walks,
water snorkeling snorkeling, families. shelling, kayaking.
How to Get to Passage Key
Of all the barrier islands, Passage Key is the most difficult of all to get to. But that is also why its so special. Less trafficked and fewer people.
Private/Rental Boat
Visitors can rent or use their own boat to get to Passage Key. Being on your own vessel gives you the ultimate flexibility to explore at your leisure. It does put the onus of navigation and safety on oneself. Traveling the mouth of Tampa Bay with its winds, traffic, and current can sometimes be a bit unnerving.
​Most boaters will depart from Fort De Soto Boat Ramp (Tierra Verde) or Kingfish Boat Ramp (Holmes Beach/Anna Maria Island). The trip from Fort De Soto is only about 10 miles. The distance from the Kingfish Boat Ramp is approximately 6 miles.
Although being on your own boat might seem like an appealing adventure, there are hazards to consider, especially if you are unfamiliar with the local waters. The waters where Tampa Bay meets the Gulf of Mexico can become rough and choppy very quickly. The Egmont Channel has dramatic depth changes (from 100ft to 3ft) and heavy ship traffic.. The tidal currents are strong, and visitors must consider their anchoring equipment (ground tackle) in order to safely and properly secure their vessel. The conditions at Passage Key warrant two anchors to prevent the boat from swinging about in the tides and the winds. Familiarity with scope and other aspects are also crucial, as boats have been known to come loose in the strong Passage Key currents.
Private Charter Options
Private charters provide the best and easiest option for visiting Passage Key. These full-service charters are commonly a half-day in length, and they provide a comfortable and enjoyable boat ride to the island. The charters typically include iced coolers, snorkel gear, pool noodles, and other inflatable options. The captain is also your guide and will provide a higher level of service, delivering guidance, and a narration of the local history and wildlife. On these types of private excursions, the guests are able to shape their itinerary to fully accommodate their personal tastes and abilities. Most importantly, your boat crew will serve as lifeguards for you and your group while snorkeling.
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Another great advantage of the private charter to Passage Key is guests have the unique opportunity to sample different locations, and experience the sand, waters and shells and unwind in serene settings without the need for any strenuous activity. This makes for an ideal of relaxation and exploration in a breathtaking natural environment.
Ferry Boat Options
Given the isolated nature of Passage Key, it's government-protected status, and its lack of shoreline, there are no ferry boat options to Passage Key.
For most visitors staying in St. Petersburg or St. Pete Beach, a guided boat tour is the easiest way to reach Passage Key. These tours typically depart from Tierra Verde and allow 3 hours at Passage Key.
Final Thoughts on Visiting Passage Key
Visiting Passage Key is truly a magnificent adult adventure, that should not be missed by any free-spirit visiting the areas of St. Petersburg or St. Pete Beach. The calm, crystal-clear waters and a distinctive bohemian vibe is makes it a peaceful and memorable escape from civilization.
Book a Passage Key Charter Tour
One of the best ways to experience Passage Key is by joining a private Passage Key charter, departing from the St. Petersburg area. These guided tours are operated by licensed professional captains who are both friendly and discreet. They will make sure your tour to Passage Key is safe, and provides memories to last a lifetime.
There are other magnificent experiences offered near St Pete, such as the Sunset on the Gulf, as well as kayaking to Shell Key, a great way to see wildlife in a tranquil setting. The dolphin cruise also provides an opportunity to snorkel Shell Key Preserve. The St Pete Sandbar parties are also hit, and we offer an option to Shell Key Sandbar parties and the Passage Key sandbar. Both are exotic tropical experiences.
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Passage Key — Frequently Asked Questions
Can You Go on Passage Key Island?
Passage Key itself is part of a protected wildlife refuge and is closed to public access. Visitors are not allowed to walk onto the dry sand or disturb the island because it serves as a critical nesting habitat for seabirds.
However, many boaters visit the surrounding shallow waters and sandbars, where you can swim, float, and relax near the island without stepping onto protected land.
How Do You Get to Passage Key?
Passage Key is only accessible by boat. Most visitors reach the area by private boat or guided boat tour departing from St. Petersburg, Tierra Verde, or Anna Maria Island.
Because of its offshore location at the mouth of Tampa Bay, visiting Passage Key is typically part of a boating or sandbar excursion.
Can You Walk on the Sand at Passage Key?
Visitors must remain in the water or wave-wash zone and are not permitted to walk onto the protected dry portions of the island.
This rule helps protect nesting birds and sensitive habitats. Most visitors enjoy the experience from the surrounding shallow sandbars instead.
What Is Passage Key Known For?
Passage Key is known for its clear shallow water, sandbars, and remote natural setting. It is one of the most undeveloped and secluded barrier islands near St. Petersburg, offering a peaceful environment for swimming, floating, and relaxing away from crowded beaches.
The island is renowned with the locals as a place with the naturist free-spirited vibe detached from society's norms..
Is Passage Key Clothing Optional?
Yes — the waters surrounding Passage Key have a long-standing reputation as a clothing-optional sandbar area. This is one of the few places in Florida where this type of environment exists, although it is informal and not officially designated.
Visitors should always be respectful of others and aware of the environment.
How Deep Is the Water at Passage Key?
The water around Passage Key is typically shallow, often waist-deep or less, making it ideal for standing, floating, and relaxing.
Depth can vary depending on tides, weather, and sandbar movement, but calm and shallow conditions are common in the area.
Is Passage Key Good for Swimming?
Yes, Passage Key is one of the best spots in the Tampa Bay area for swimming. The shallow, clear water and gentle conditions make it ideal for relaxing in the water rather than traditional beach lounging.
Because there are no facilities or lifeguards, visitors should always use caution and be aware of changing conditions.
How Long Is the Boat Ride to Passage Key?
Boat rides to Passage Key typically take about 20 to 30 minutes depending on your departure location. Trips from Tierra Verde, St. Pete Beach, or Anna Maria Island are among the most common routes.
The journey itself often includes dolphin sightings and scenic views of Tampa Bay.
Are There Facilities on Passage Key?
No — Passage Key is completely undeveloped. There are no restrooms, restaurants, or shaded structures on or near the island.
Visitors should bring everything they need, including water, sunscreen, towels, and snacks.
Is Passage Key Worth Visiting?
Passage Key is absolutely worth visiting if you’re looking for a quiet, natural sandbar experience. Unlike more developed beaches, it offers a remote setting with clear water, open space, and a relaxed atmosphere.
For many visitors, it’s one of the most unique boating destinations near St. Petersburg.