7 Best Fishing Spots in Marathon, Florida

What Fish Can You Catch in Marathon FL? A Complete Seasonal Guide

Fishing Spots in Marathon, Florida sits at the heart of the Keys, offering anglers access to some of the most diverse saltwater fishing in North America. From bridge fishing right in town to world class backcountry flats just minutes from our properties, Marathon provides year round action for every skill level.

Quick Answer: The most popular species in Marathon FL include tarpon (spring), permit (fall), bonefish (year-round), snapper (summer), and mahi-mahi (offshore). Bridge fishing produces jacks, mackerel, and snapper daily.

Whether you’re planning a deep-sea adventure or prefer wetting a line from our 70-foot private docks, Marathon delivers. This guide covers the seven best fishing spots in Marathon FL, complete with seasonal patterns, local tips, and the best ways to experience each location.

Whether you’re planning a deep-sea adventure or prefer wetting a line from our 70-foot private docks, Marathon delivers. This guide covers the seven best fishing spots in Marathon, Florida, complete with seasonal patterns, local tips, and the best ways to experience each location.

1. Seven Mile Bridge Fishing

Seven Mile Bridge stretches from Marathon to the Lower Keys, creating an artificial reef system that’s become one of the most productive fishing spots in the Middle Keys.

What You’ll Catch: Jacks, mackerel, snapper, grouper, and occasional tarpon migrate through this area seasonally. The bridge pilings attract baitfish, which attract predators.

Best Seasons: Year-round, with peak tarpon in May-June. Snapper season peaks summer through early fall.

Local Tip: Fish the bridges at night using glow lures. The bridge lights attract baitfish, which trigger feeding frenzies. The Old Seven Mile Bridge (Pigeon Key side) is less crowded and produces equally well.

The best bridge fishing happens during outgoing tide, two hours before to two hours after low tide. Position downstream of the bridge pilings where current concentrates baitfish.Fish from the 70-foot dock at Blue Pearl which is just 15 minutes from Seven Mile Bridge with an on-site cleaning station.

2. Sombrero Beach Pier

Located inside Sombrero Beach Park in Marathon, this family-friendly fishing pier offers accessible fishing without needing a boat. The park has free parking, restrooms, picnic pavilions, and a playground, which makes it ideal for a full beach-and-fishing day with kids. More info at the FWC Sombrero Beach fishing pier page.

What You’ll Catch: Snapper, grouper, barracuda, sheepshead, and the occasional flounder. Surf fishing from the adjacent shoreline can produce tarpon and snook during spring and summer.

Best Seasons: Year-round. Sheepshead bite best in winter months (December-February). Tarpon action picks up April through June.

Local Tip: Park free in the Sombrero Beach lot (open 7:30 AM to dusk). Fish the shallows at high tide using live shrimp or small jigs. For night fishing with lights attracting baitfish, head to the Old Seven Mile Bridge or Vaca Cut instead. Both are open to the public and consistently produce larger jack crevalles, tarpon, and snook after dark.

The pier works best at dawn and dusk. During midday, move to the grass flats just off the beach and wade-fish for snapper and small jacks.

3. Boot Key Harbor

Boot Key Harbor offers protected backcountry fishing minutes from our vacation rentals, making it ideal for kayak fishing or casting from the seawall.

What You’ll Catch: Snook, redfish, trout, and juvenile tarpon (poons). The harbor hosts diverse species due to its mix of deep water, grass flats, and mangrove shorelines.

Best Seasons: Snook and redfish year-round, with peak activity spring through fall. Winter produces excellent sheepshead.

Local Tip: Fish the mangroves at the harbor’s northern end during outgoing tide. Snook stage here waiting for baitfish to exit the harbor. Launch kayaks from Ocean Muse. The property includes two kayaks and direct harbor access.

4. Bahia Honda Backcountry Flats

Just a 20-minute drive from Marathon, Bahia Honda State Park provides world-class shallow-water fishing on pristine grass flats.

What You’ll Catch: Bonefish (the “gray ghost” of flats fishing), permit, and juvenile tarpon. The flats here are famous among fly anglers.

Best Seasons: Bonefish year-round, permit September-November, tarpon April-June.

Local Tip: Sight fishing requires ultralight tackle and patience. The key is spotting fish before they spot you. Wade slowly, stay low, and cast well ahead of the fish.

Fish the flats early morning (sunrise to 9 AM) for best sight-fishing conditions. Midday heat pushes bonefish to deeper water where they’re still catchable but harder to spot.

5. Marathon Residential Canals (Private Dock Fishing)

The deep-water canals running through Marathon’s residential neighborhoods offer some of the most convenient fishing in the Keys, accessible right from our private docks. These canals connect directly to the Gulf of Mexico and the Atlantic, funneling bait and predators past your dock year-round.

What You’ll Catch: Mangrove snapper, yellowtail snapper, snook, jacks, and occasional tarpon passing through during spring and fall migrations. Nighttime dock fishing produces snapper and snook drawn to the lights.

Best Seasons: Year-round snapper and snook fishing. Tarpon migrations occur May-July and September-October.

Local Tip: Fish our docks at night under the dock lights. Snapper and snook actively feed on baitfish attracted to the glow. Live pilchards or frozen shrimp work excellently. Set up a small chum bag in the current to multiply your hookups.

Work the shadow line where the dock light fades into dark water. Predators sit just outside the light waiting for baitfish to stray. Fish from your private dock at Deep Blue or Azul Paradise. Both feature 50-foot docks with lights for night fishing.

6. Offshore Wrecks and Reefs (Deep Sea)

For anglers seeking adventure, Marathon provides quick access to offshore fishing grounds holding massive fish. The Thunderbolt, a 188-foot steel ship sunk as an artificial reef in March 1986, sits upright in 120 feet of water just 4 miles south of Marathon and Key Colony Beach and is the crown jewel of the local wreck fleet.

What You’ll Catch: Mahi-mahi (dolphinfish), wahoo, tuna, sailfish, and large grouper on the offshore edge. The Thunderbolt and surrounding artificial reefs hold mutton snapper, amberjack, African pompano, and goliath grouper.

Best Seasons: Mahi and wahoo peak summer-fall. Sailfish November-March. Grouper year-round with seasonal closures.

Local Tip: Troll ballyhoo behind skirted lures or deploy live bait near temperature breaks where water masses meet. Offshore fishing requires a boat with 30+ mile range, so most guests book a licensed local captain.

Book a charter through a licensed Marathon operator. We recommend asking your host for current captain recommendations, since we work directly with several who know our guests and their experience level.

7. Tom’s Harbor Cut Bridge

Located at Mile Marker 61 just north of Marathon city limits, Tom’s Harbor Cut Bridge is a longtime local favorite with fishing platforms, ample parking, and easy access from the Overseas Highway.

What You’ll Catch: Mangrove snapper, yellowtail snapper, permit, blue runners, Spanish mackerel, barracuda, and tarpon. Cubera snapper show up around the October full moon phase.

Best Seasons: Year-round snapper action. Permit peak in fall. Tarpon migrations occur April through June.

Local Tip: Fish three to five days before the full moon for peak cubera snapper action, especially at night. Use a chum bag in the current to draw fish in from the surrounding flats. Live pinfish or deboned mullet on a fish-finder rig works well for larger cubera and mutton.

The bridge sits between Duck Key and the Grassy Key area, so the current runs hard on tide changes. Fish the ocean side on outgoing tide and the Gulf side on incoming, and adjust your weight so you can feel the bottom without snagging. Stay at Seabreeze Cove in Key Colony Beach for a central Marathon home base with a private 38-foot dock, putting Tom’s Harbor Cut, Sombrero Beach Pier, and Boot Key Harbor all within easy reach.

Best Time to Fish in Marathon by species

Fishing Regulations you Need to Know

Before casting, ensure you have proper licensing and understand size limits:

Florida Saltwater Fishing License: Required for all anglers 16+. Purchase online at GoOutdoorsFlorida.com or at local bait shops.

Tarpon Tag: Required for tarpon over 40 inches. $50 annual tag supports conservation. More at MyFWC Tarpon Tag page.

Size Limits: Snapper varies by species (10-12 inches typical). Grouper has seasonal closures.

Bag Limits: Check MyFWC.com for current regulations. Limits change annually.

Where to Stay for Fishing in Marathon FL

Our vacation rentals provide direct access to the best fishing in the Keys:

Fishing-Focused Properties:

Every fishing property includes: private dock with cleaning station, dock lights for night fishing, fish cleaning facilities, on-site bait and tackle storage, and quick bridge and offshore access.

FAQ: Fishing in Marathon, Florida