Thomas' Mangrove Lagoon, explore Cas Cay on foot and snorkel in the marine reserve. Equipment, instruction, water, snacks and lockers are included; the hike crosses uneven sand and coral rubble, and moderate fitness is required. 4.88 from 1,083 reviews at €90 per person for 3h.
Best for: For moderately fit first timers, choose Cas Cay's kayak, hike and snorkel tour with instruction at €90 per person for 3h; expect uneven ground. Parasailing, Jet Ski & Kayaks comparison
Trade-off: Hike crosses uneven sand and coral rubble.
In our comparison: #21 of 48 in Snorkeling Tours, by rating weighted by review volume (see the comparison).
2 options from the operator, described in its own words. Prices are the operator's from-prices per adult for a party of two. Click an option to book it on Viator. Guide languages on every option: English.
| Option | What the operator says | From, per adult |
|---|---|---|
| Cas Cay 9:30 AMThe page price | Tour | €90 |
| Cas Cay 1:30pm | 3hr Kayak, Hike, and Snorkel Tour explore the Mangrove Lagoon and Cas Cay. Depart from our Mangrove Lagoon Marina at 1:30pm. Please arrive at least 15 minutes prior to departure time. | €90 |
Child prices by age band are shown at checkout. Option texts and prices come from the operator's listing; prices checked on Viator on 6 October 2026.
97% of ratings with a star breakdown are 4★ or 5★: 1,054 of 1,083
Star breakdown of all 1,083 ratings
Reviews are shown as the platforms publish them and removed when they disappear there.
Ratings collected from Guidekin, Viator & Tripadvisor.
This award winning tour offers a unique, multi-eco experience. Kayak among the many small islands that make up St. Thomas' Mangrove Lagoon, including the pristine Cas Cay. This wildlife sanctuary and marine reserve is world famous for its winding, shallow waterways, beautiful mangrove trees with nesting birds, and colorful marine life. Hike and explore Cas Cay! Try your luck with a hermit crab race in a forest with an unusual community of thousands of hermit crabs. An eight minute walk along a level sandy, coral and shell rubble trail leads you to a dramatic area of cliffs with breathtaking views, tidal pools and a rare geologic blowhole. Relax and enjoy the sounds of the splashing water and the beautiful rock and cliff formations. Your guide will show you many new and interesting creatures and unforgettable places. After an eight minute hike back to the kayaks, you will don your mask, snorkel and life jacket and snorkel with colorful fish and sting rays.
The operator's own notes, grouped by topic. Nothing here is added by Guidekin.
For a full refund, cancel at least 24 hours before the scheduled departure time.
| Tour | Price | Duration | Rating | Group |
|---|---|---|---|---|
| This tour · #21 of 48 | €90 | 3h | 4.88 (1083) | shared |
| Snorkeling Adventure in St Thomas | €117 | 3h 30m | 5.0 (282) | shared |
| Afternoon Snorkel, Pizza & Sunset Tour departing from St. Thomas & St. John | €109 | 5h 30m | 4.93 (1873) | shared |
| 6-Hour Turtles, Pizza Pi & Sunset Sail | €318 | 6h | 4.95 (444) | shared |
Ranked #21 of 48 in Snorkeling Tours by Guidekin score (rating weighted by review volume). Prices here run from €59 to €454, median €118; typical length 4h. 10 of 48 are private. Figures are live from the tour cards; the rubric is our handpicked set, not the whole market. Compare all 48 Snorkeling Tours