Best Fishing Spots Near Marathon, FL: A Complete Guide for Anglers

by | Feb 17, 2026 | Uncategorized

Best Fishing Spots Near Marathon, FL: A Complete Guide for Anglers

Marathon sits right in the heart of the Florida Keys, surrounded by some of the most productive fishing water in North America. With the Gulf of Mexico on one side and the Atlantic Ocean on the other, anglers here have access to everything from shallow flats loaded with snook and bonefish to deep offshore waters where blackfin tuna, mahi-mahi, and sailfish patrol the currents.

Whether you fish from shore, launch your own boat, or book a charter, Marathon delivers world-class fishing year-round. Here are the best spots to wet a line — and how to make the most of each one.

Bridge Fishing: Marathon’s Signature Experience

The Florida Keys are connected by a chain of bridges, and the waters around those bridge pilings create some of the most concentrated fishing action you will find anywhere. Tidal currents funnel baitfish through the channels, and predators stack up to feed. For visiting anglers, bridge fishing is one of the easiest and most affordable ways to get on fish without a boat.

Seven Mile Bridge

The iconic Seven Mile Bridge is one of the most famous fishing locations in the entire Florida Keys. The deep channel near Moser Channel draws large schools of tarpon during the spring and summer migration (April through July), and the pilings hold snapper, grouper, Spanish mackerel, and jack crevalle year-round. In winter, head to the north side of the bridge for mackerel, bluefish, and sharks.

If you are fishing by boat, anchor upcurrent from the pilings and chum back toward the bridge. Use jigs, small slip-sinker rigs, or live bait. Tarpon anglers will want larger baits like mullet or blue crab and a quick-release anchor setup, since hooked tarpon take off fast and you will need to chase them.

Distance from Blackfin Resort: About 5 minutes by boat from the marina.

Bahia Honda Bridge & State Park

Just south of the Seven Mile Bridge, Bahia Honda State Park offers excellent shore fishing in a beautiful setting. The old Bahia Honda Bridge and the surrounding waters are prime territory for tarpon during migration season. The flats inside the park hold snook, trout, and permit. This is a great spot for families — the kids can enjoy the beach while you fish the shoreline and bridge pilings.

Tip: A small entrance fee is required for the state park. Arrive early on weekends, as the park fills to capacity during peak season.

Long Key Bridge & Toms Harbor Bridges

Heading north from Marathon, the Long Key Bridge and the pair of bridges at Toms Harbor are productive fishing spots that see less pressure than the more famous Seven Mile Bridge. Tarpon move through these channels during the spring migration, and you will find mangrove snapper, yellowtail snapper, and bonefish around the pilings throughout the year. Long Key State Park also offers calm, wadeable flats for light-tackle fishing.

Shore & Beach Fishing

Sombrero Beach

Sombrero Beach is one of the best spots in Marathon for surf fishing. Located on the Atlantic side, the beach drops off into deeper water relatively quickly, putting you within casting range of tarpon, snook, barracuda, and various snapper species. It is also a family-friendly spot with picnic areas, restrooms, and shade — perfect for combining a day at the beach with some fishing.

Distance from Blackfin Resort: About 5 minutes by car.

Boot Key Harbor & Fat Deer Key

The canals, channels, and mangrove shorelines around Boot Key and Fat Deer Key offer excellent inshore fishing for snook, mangrove snapper, and juvenile tarpon. These areas are ideal for kayak fishing or wading the shallows with light tackle. The protected waters of Boot Key Harbor are especially productive during incoming tides when baitfish get pushed into the channels.

Inshore Flats & Backcountry

Marathon’s Gulf side opens up into vast shallow flats and mangrove-lined backcountry that is home to some of the most prized inshore species in saltwater fishing. The water here ranges from 3 to 7 feet deep — crystal clear and perfect for sight fishing.

Target species on the flats include:

  • Tarpon — Resident juvenile tarpon cruise the backcountry year-round, and giant migratory tarpon (80–150+ pounds) pass through from March through June.
  • Bonefish — The “gray ghosts” of the flats are a fly-fishing favorite. They gather in large schools during fall months, with big fish feeding aggressively before their offshore spawning run.
  • Permit — One of the most challenging fish on the flats, permit are prized for their power and selectivity. Crab imitations work best.
  • Redfish — Found tailing on the flats and around mangrove roots, redfish offer a fun fight on light tackle.
  • Snook — One of the Florida Keys’ most beloved gamefish, snook patrol the mangrove shorelines and ambush bait along the edges.

An inshore fishing charter is the best way to explore the backcountry if you are new to the area. Local guides know the tides, the channels, and exactly where fish are holding on any given day.

Reef & Wreck Fishing

Marathon is surrounded by an extensive network of natural coral reefs and artificial wrecks that hold impressive populations of snapper, grouper, and other reef species. The reef line runs roughly parallel to the Keys a few miles offshore on the Atlantic side, and many productive spots are within a 15- to 20-minute boat ride from the marina.

What you will catch on the reef:

  • Yellowtail snapper, mangrove snapper, and mutton snapper
  • Black grouper and red grouper
  • King mackerel, cero mackerel, and Spanish mackerel
  • Amberjack on the deeper wrecks (these can exceed 100 pounds)
  • Barracuda, cobia, and the occasional sailfish cruising the reef edge

The Thunderbolt wreck — a 188-foot former research vessel resting in about 120 feet of water — is one of Marathon’s most popular wreck-fishing destinations. It holds big amberjack, grouper, and african pompano. Sombrero Reef, marked by the Sombrero Key Lighthouse, is another productive area with depths ranging from shallow patch reefs to deeper ledges.

Pro tip: June and July bring the mangrove snapper spawn on the reef, which is some of the best meat-fishing action of the year. Plan a combo trip — fill a cooler with snapper on the reef, then head offshore to chase mahi or tuna.

Offshore & Deep Sea Fishing

The Marathon Hump

If there is one offshore destination every serious angler needs to experience, it is the Marathon Hump. Located about 25 to 30 miles southeast of Marathon, the Hump is an underwater seamount that rises from over 1,000 feet of water to a peak of about 409 feet. That dramatic depth change creates a powerful upwelling of nutrients that attracts massive concentrations of baitfish — and the predators that follow them.

What you will find at the Hump:

  • Blackfin tuna — The Hump almost always holds blackfin tuna. Best months are March through July, with feather trolling and deep jigging being the most effective techniques.
  • Mahi-mahi (dolphinfish) — Spring and summer bring large numbers of mahi, often found around weed lines and floating debris on the way to and from the Hump.
  • Wahoo — These lightning-fast fish patrol the deeper water around the Hump. They are prized for both the fight and the table.
  • Sailfish and marlin — Billfish are a possibility any time you venture offshore, with sailfish especially active from October through February.

Tip: A Hump trip requires a full-day charter and calm weather. Ironically, windier days often produce better fishing due to increased water turbulence and less boat traffic.

The Gulf Stream & Reef Edge

You do not always have to run 25 miles offshore to find pelagic action. The Gulf Stream current flows along the reef edge, and during fall and winter months, baitfish move closer to shore, bringing offshore species with them. Sailfish, king mackerel, and cobia can be caught just a few miles out when conditions are right. Local charter captains use kite fishing techniques along the reef edge to target sailfish during the cooler months, and it is not uncommon to get multiple hookups on a single trip.

When to Fish: A Seasonal Guide

Marathon offers year-round fishing, but different seasons bring different opportunities. Here is a quick breakdown to help you plan your trip:

Winter (December – February): Sailfish are in force along the reef edge. King mackerel, cero mackerel, and Spanish mackerel are thick on the reef. Reef fishing for snapper and grouper is excellent. Cooler air temperatures bring comfortable fishing weather, and bonefish arrive inshore in large numbers by February.

Spring (March – May): This is peak tarpon season. Giant migratory tarpon flood the bridges and channels, creating some of the most exciting fishing of the year. Offshore, mahi-mahi, blackfin tuna, and wahoo pick up at the Hump. Blue and white marlin move through the area. This is arguably the best all-around fishing season in Marathon.

Summer (June – August): Offshore fishing peaks with mahi, tuna, and sailfish. The mangrove snapper spawn hits the reef in June and July, offering outstanding bottom fishing. Calmer seas allow longer runs to the Marathon Hump. Tarpon remain in the area through June.

Fall (September – November): Bonefish aggregate in large schools on the flats before heading offshore to spawn — this is prime time for catching big bonefish. Mackerel return to the reef. The transition from summer to winter patterns means a wide variety of species are available both inshore and offshore.

Fishing License Information

Anyone 16 or older needs a valid Florida saltwater fishing license to fish in Marathon. Non-residents can purchase a 3-day license ($17), 7-day license ($30), or annual license ($47) online at GoOutdoorsFlorida.com or through the Fish|Hunt Florida mobile app.

Good news for charter and pier anglers: If you fish from a licensed charter boat or a licensed fishing pier, the captain’s or pier’s license covers you — no individual license needed.

Always check current regulations with the Florida Fish and Wildlife Conservation Commission (FWC) before your trip. Size limits, bag limits, and seasonal closures apply to many species and can change from year to year.

Stay at Blackfin Resort & Marina: Built for Anglers

Blackfin Resort & Marina sits on the Gulfside of Marathon at Mile Marker 49.5, and it was designed with fishing in mind. Our property gives you everything you need for a fishing-focused vacation:

  • Full-service marina with boat slips accommodating vessels up to 40 feet. Slips include 30-amp electric, water, WiFi, and pump-out service.
  • Boat ramp with direct access to the Gulf of Mexico and the Atlantic Ocean. Launch your trailered boat and be fishing in minutes.
  • Fish cleaning station right on the property so you can clean your catch as soon as you get back to the dock.
  • BBQ grills and picnic areas where you can cook your fresh catch the same day you pull it from the water.
  • On-site dive shop (Tilden’s Scuba Center) operating right from the Blackfin dock, offering snorkeling, diving, and spearfishing trips.
  • Hurricane Grille right on the property for breakfast, lunch, dinner, and cold drinks after a long day on the water.

Whether you are trailering your own boat, docking at the marina, or booking a charter from one of Marathon’s many local captains, Blackfin Resort puts you right where the action is. You can walk from your room to the dock, launch your boat at sunrise, fish all day, clean your catch at the station, and grill it for dinner — all without leaving the property.

Ready to plan your Marathon fishing trip? Book your stay at Blackfin Resort & Marina and experience the best fishing the Florida Keys has to offer.