St. Thomas Mangrove Lagoon Cas Cay Kayak, Hike & Snorkel (5 hrs with lunch) 

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  • Adults: $139.00
  • Children (8-12): $79.00
  • Youth (2-7): $15.00
  • For cruise ship passengers: add a round-trip taxi to and from your ship (+ $10)


On this tour you will:

  • Kayak through the narrow waterways through mangrove tree islands.
  • Hike Cas Cay, a pristine and deserted island. Explore volcanic cliffs and a geological blowhole.
  • Snorkel around a coral-fringed mangrove nursery in clear, protected waters. 
  • Enjoy a picnic lunch. 


 As a favorite 5 hour tour, this unique experience allows you to fully explore St. Thomas’ Inner Mangrove Lagoon as well as the island of Cas Cay.

It begins as you make your way in a kayak through the many small islands of the Mangrove Lagoon to Long Point and Patricia Cay. From there, enjoy breathtaking scenic views from the coral rubble barrier reef, which divides Long Point, the southernmost tip of St. Thomas, from the deserted island of Patricia Cay. Your guide will point out coral and shells, as well as interesting marine life, including bristle stars, sea urchins, chitons, and possibly even an octopus—all of which can be easily seen in the very shallow and clear waters.

From there, continue paddling through mangrove alleyways. Look up for nesting pelicans or peek down for eagle rays swimming in the water under you. Even pass over several shipwrecks below as you make your way through the lagoon.

The hiking portion of the tour begins once you arrive at the 15-acre deserted island of Cas Cay. Now a wildlife sanctuary, it is made up of mangrove forests to the south and volcanic cliffs to the north. As you explore on foot you will learn about the importance of the mangrove ecosystem and how to identify various tropical plants, including their edible and medicinal uses. Enjoy a 15-minute stroll at a leisurely pace and take in the scenic view from a coral and rubble beach.

 Once you arrive at the south side of Cas Cay, you will be among impressively large boulders flanked on either side by volcanic cliffs. It’s also home to the famous Red Point Blow Hole, a unique geological phenomenon. This is the spot where you will rest and enjoy a picnic lunch from a local market with your guide.

 After lunch and a rest, you will hike to the coral-fringed mangrove nursery, which begins the snorkel portion of the tour. Your guide will take you on a 45-minute journey through the shallow marine habitat. Explore the sea grass, mangrove nursery, and learn about the nuances and complexities of the abundant marine life that inhabit in this dynamic ecosystem. Guides offer snorkeling instruction for first-timers or those who want a few extra tips to make the most of the experience.

 If you have any further questions on what to expect on this tour please call us toll free at 1-877-845-2925.



Virgin Islands Ecotours - Mangrove Lagoon location - Rte 32, East End, St Thomas, U.S. Virgin Islands
  • Book the round-trip taxi or meet at Virgin Islands Ecotours at the Mangrove Lagoon Marina.
  • Kayak through the lagoon to the island of Cas Cay.
  • Hike the deserted Cas Cay island, visiting volcanic cliffs, a geological blowhole, and rubble beaches. 
  • Enjoy a picnic lunch with your guide.
  • A 45-minute guided snorkel in the mangrove nursery.
  • Paddle back to the Mangrove Lagoon Marina.

This tour departs from Mangrove Lagoon Marina in St. Thomas. 


*For Cruise Ship Passengers*: Round-Trip Taxi: Book a round-trip taxi to the Mangrove Lagoon from your cruise ship through Virgin Islands EcoTours for just $10, which is 50% off the regular taxi rate. When booking the tour, select the Shore Excursion option and the name of your cruise ship (or hotel) when prompted. If your ship docks at Havensight, meet the taxi in front of Tap and Still Restaurant. If your ship docks in Crown Bay, meet the taxi in front of the big windmill visitor information center. Please be at the meeting place 10 minutes prior to your taxi’s arrival to ensure a quick transfer.

Text (340) 642-9314 or call locally (340) 779-2155 with any questions. 



If making your own way, our main marina is located on the southeast side of St. Thomas. Please plan to arrive 15 minutes prior to your tour. Here's how to find us:

From Town: Take route 30 East until it intersects with route 32 (also the Bridge to Nowhere/Esso Station), turn right (southeast) and we are located on the right side of the road. We're the big green trailer with the mask and snorkel on the side.

From Red Hook: Head southwest on route 32 towards town, we are located on the left side of the road. We're the big green trailer with the mask and snorkel on the side.


At the conclusion of the tour you will return to Mangrove Lagoon Marina in St. Thomas with your guide.

If you booked the round-trip taxi, it will take you back to your original meeting place at the conclusion of your tour. 

We kindly ask our guests to bring along the following items for their tour, so they can have as much fun as possible:

  • Bathing suit & towel.
  • Clothing that can get wet. Hat, sunglasses, etc., for sun protection.
  • Footwear that can get wet (watershoes or sandals). Strap around the heel recommended.
  • Gratuity for your guides.
  • A great attitude to have the best experience of your holiday!


As a part of this tour, we include snorkels & masks, kayaks & paddles, life jackets, a mesh bag for items that can get wet, free lockers, beverages & snacks, a full safety briefing, and kayaking/paddling & snorkeling instruction. There are also dressing rooms & toilet facilities available.

Lunch from a local market is also included in this tour!

Photos - There will be a photographer who will take pictures of your entire tour experience and offer a digital file of 250-300 pictures for $30. None of these photos are watermarked and you will be able to email, download, print, and publish them anyway you choose. In addition, we will include our "Best Of" Compliation for free, which showcases hundreds of our favorite pictures that we have collected over the years—they are catalogued to help you learn, identify, and remember the creatures and plants that you saw on your tour. 

Round-Trip Taxi - A round-trip taxi service from your cruise ship or hotel is available for just $10 when booking your tour. It's the easiest and most hassle-free way to reach our location at the Mangrove Lagoon and is 50% off the regular taxi rate. 

Other Items - The store offers incidentals you may have left behind including towels, sunscreen, and sunglasses. We also sell t-shirts and wet/dry perfomance shirts, water shoes, and souvenirs to remember your adventure.

Your payment is 100% refundable until 24 hours before the date and time your tour is due to depart. If you cancel your booking with less than 24 hours notice or fail to show up for your tour, then the full cost of the tour will be charged to the credit card used to guarantee your tour.

Virgin Islands Ecotours - Mangrove Lagoon location
Rte 32, East End, St Thomas, U.S. Virgin Islands