About this experience

Enjoy a 3-hour snorkeling adventure in Marathon Key at one of the world's most incredible reefs. Sombrero Reef is alive. It is a place where parrotfish feed on the living coral while trumpetfish try to blend in among its branches. The reef is protected, so you can expect to see large schools of grunts and snappers swimming among large groupers hiding in the crags and looking for a meal. The great barrier reefs on our planet are precious. Like underwater rainforests, they teem with wildlife and colorful corals.
You are welcome to bring food and drinks with you.

At a glance

Duration: 3 hr

Choose your tour option

Select a date and travellers to compare current prices and departure times.

Marathon Key: 3-hour Snorkeling adventure on a Pontoon at Sombrero Reef

Sunset Cruise Snorkeling

Sunset Cruise : Enjoy a champagne toast!
Duration: 2 hours

Plan your experience

Time on the tour3 hr

Guide languagesEnglish (live guide)

Set aside 3 hr for the experience itself, with additional time to reach your meeting or pickup point.

Compare the available options before choosing: their itinerary, inclusions and pickup arrangements can differ. Check the price for your date and whole group.

Before you go

Suitable for all physical fitness levels

Local guides to help you plan

Key West Reef Snorkeling vs Sandbar Snorkeling

Only one Key West snorkel trip matches your crew, comfort, and conditions—discover whether reef thrills or sandbar serenity is the smarter choice.

Key West Reef Snorkel Cruise: What to Expect

A Key West reef snorkel cruise combines a boat ride with time in the water, usually in about three hours. Learn how to compare itineraries, find the right dock, prepare for changing conditions, and snorkel responsibly.

Key West to Marathon Day Trip: What’s Worth Doing

Key West to Marathon rewards an early start with hidden stops, quiet bridges, and one detour you’ll want to know before parking fills up.

What is included

Use of Snorkelling equipment

Not included

You are welcome to bring your own no glass please

Itinerary and highlights

3 hour cruise to Sombrero Reef and we will snorkel and enjoy the lighthouse. Sombrero Key Light is located offshore of Vaca Key in Marathon, Florida. The lighthouse is located on a mostly submerged reef. One of the planet’s largest and most spectacular barrier reefs where there is an underwater wonderland full of magnificent living coral and tropical fish. Sometime we even will see Dolphins.

See the overview, available options and booking details for the experience schedule.

Languages and tickets

English — Guide
Mobile Only

Tour operator

Attractions4us LLC

Meeting points and locations

Accessibility and practical details

Suitable for all physical fitness levels

Cancellation policy

For a full refund, cancel at least 24 hours before the scheduled departure time.

Questions about this experience

How long is this experience?

The supplier lists a duration of 3 hr. Check your chosen tour option for its specific itinerary.

Which guide languages are listed?

English (live guide).

What ticket format is listed?

Mobile ticket.

What ticket age bands are listed?

Child tickets: age 1–9; Adult tickets: age 10+. Check the practical details for participation requirements.

What is the cancellation policy?