Marathon Key Beaches.

5 Best Marathon Key Beaches

Written by Boatsetter Team
October 13, 2022

Last Updated on October 13, 2022 by Boatsetter Team

Marathon Key Beaches are some of the most beautiful in Florida (and in the US). Its white sand and pristine water beaches are why people come here to visit and never leave (or end up buying their beach houses here).

Finding the right beach can sometimes take a while if you’re unfamiliar with the place. Thankfully you’ve come to the right boating community that will save you time by sharing with you our top 5 Marathon Key beaches:

  1. Bahia Honda State Park
  2. Dry Tortugas National Park
  3. Sombrero Beach
  4. Sunset Bay Park
  5. Pigeon Key Foundation Marina Science Center

Read all the way through to catch additional Pro Boatsetter Tips!

Get on a Boat Rental to explore Marathon Key the right way

1. Bahia Honda State Park

Bahia Honda State Park.

This state park (approx. 500 acres) is located on the southern tip of Marathon Key and offers visitors a secluded beach experience. The sparkling waters and white sand beaches make Bahia Honda a popular spot for swimming, sunbathing, and snorkeling. There is also a nature center where you can learn about the local plants and animals.

Bahia Honda State Park has the historic Bahia Honda Railroad Bridge, which is now used as a fishing pier. Visitors can also walk or bike along the trail that runs across the bridge.

You also have an offshore island here to explore as well!

2. Dry Tortugas National Park

Dry Tortugas National Park.

Dry Tortugas National Park (47,125 acres) is located about 70 miles west of Marathon Key. This park is only accessible by boat or seaplane. Once you arrive at the park, you can take a ferry to Fort Jefferson.

This fort was built in the 1800s and served as a prison during the Civil War. This park is a popular spot for picnicking, swimming, and exploring the old fort.

The waters around Dry Tortugas National Park are crystal clear, which makes it ideal for snorkeling and scuba diving.

3. Sombrero Beach

Sombrero Beach.

Sombrero Beach is located on Marathon Key and is one of the most popular beaches on the island. The beach gets its memorable name from the large sombrero-shaped offshore reef.

The beach has white sand and clear turquoise waters perfect for snorkeling and diving. There are also several restaurants and bars to recharge your batteries.

The Turtle Hospital is located near Sombrero Beach. This facility rescues and rehabilitates sick and injured turtles. You can tour the hospital to learn more about these amazing creatures. Here’s a Pro Destination Tip:

Dogs are only allowed on the beach when it’s not turtle nesting season!

4. Sunset Bay Park on Grassy Key

Sunset Bay Park on Grassy Key.

Sunset Bay Park on Grassy Key (405 acres) is located on Grassy Key, a small island just off Marathon Key. The park has a beautiful beach where you can relax and enjoy the views. There is also a dock where you can go fishing or swimming.

The park has several picnic tables and grills for a good ol’ cookout. There are also restroom facilities available. Dogs are allowed in Sunset Bay Park if on a leash.

5. Pigeon Key Foundation Marine Science Center

Pigeon Key Foundation Marine Science Center.

The Pigeon Key Foundation Marine Science Center is located on Pigeon Key, a discrete island off Marathon Key. This center offers educational programs about the local ecosystem.

You can take a boat tour of the island to see the wildlife or go on an adventurous kayak tour. The center also has a touch tank where you can get up close to the marine life. While there is no beach here for relaxing, there are beautiful views and lots of opportunities for snorkeling, picnics, bird watching, and much more!

There are many great beaches on Marathon Key. Sombrero Beach is a great option if you are looking for a place to relax on the beach. Dry Tortugas National Park is a good choice if you want to go snorkeling or diving.

The Pigeon Key Foundation Marine Science Center offers educational programs and boat tours if you want to explore the local ecosystem. For a scenic hike, check out the Key Colony Beach Nature Trail. 


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