Lake Pontchartrain Trout Fishing from Slidell: Bridges, Rocks, and Open Water
Trout Fishing on Louisiana's Biggest Lake
Lake Pontchartrain sprawls across 630 square miles of brackish water north of New Orleans, and its northeastern shore near Slidell provides some of the most accessible speckled trout fishing in the state. The lake's shallow average depth (12 feet), abundant oyster shell reefs, and miles of bridge pilings and seawall create a habitat mosaic that holds trout from October through April. For Slidell-area anglers, quality trout fishing starts within minutes of the boat ramp.
Key Structure on the North Shore
| Structure | Location | Why It Holds Trout | Best Approach |
|---|---|---|---|
| I-10 Twin Span Bridge | South of Slidell | 5 miles of pilings create current breaks | Drift along pilings, cast to each one |
| Causeway Bridge (north end) | West of Slidell | 23 miles of pilings, bait concentrator | Anchor near pilings on moving tide |
| North Shore Seawall | Mandeville to Slidell | Riprap holds bait and small crustaceans | Walk the wall, cast parallel |
| Shell Reefs (submerged) | Open lake, GPS marks required | Hard bottom attracts bait over soft mud | Drift and cast, bottom bumping |
Fishing the Twin Span
The I-10 Twin Span crosses the eastern end of Lake Pontchartrain between Slidell and New Orleans East, and its thousands of concrete pilings create one of the most productive trout habitats in the lake. Speckled Trout near Slidell hold in the current shadows behind pilings on moving tides, feeding on shrimp and small fish swept past the structure. Drift parallel to the bridge in your boat, casting a live shrimp under a popping cork or a 1/4 oz jig with a soft plastic to each piling as you pass.
The Twin Span has more pilings than you could fish in a lifetime. The trick is finding the ones that hold fish on a given day—look for bait flickering near the surface, current seams where the water changes speed, and pilings with visible barnacle growth. Those are the ones holding trout.
Seasonal Patterns on the Lake
October–November: Trout move out of the deeper passes and into the lake proper as it cools. The Twin Span pilings and north shore seawall produce first. December–January: Peak concentration. Trout school tightly around structure. Post-frontal sunny mornings are the best bite windows. February–March: Fish begin dispersing as water warms. The submerged shell reefs in the open lake start producing as trout transition to spring patterns. April: Trout scatter across the lake and are harder to locate in concentrations.
Shore Access for Wading and Bank Fishing
The seawall along Lakeshore Drive east from Mandeville toward Slidell allows walk-up fishing access. Cast parallel to the rocks with live shrimp under a cork or work soft plastics along the riprap edges. The Slidell municipal boat launch off Pontchartrain Drive provides ramp access for boats and a fishing platform for shore anglers. Redfish near Slidell cruise the seawall as well, particularly during the warmer months when they chase mullet along the rocks.
Tackle for Lake Pontchartrain
- 7-foot medium spinning rod, 2500-size reel, 10 lb braid, 15 lb fluorocarbon leader
- Popping corks (Versa-cork or classic Cajun Thunder) with 18-inch leaders
- Soft plastics: Matrix Shad, Vudu Shrimp, and Berkley Gulp in natural colors
- Live shrimp from any Slidell bait shop—the single most effective bait for lake trout
- A landing net is essential when fishing from the seawall—the drop to the water makes hand-landing difficult
Check LDWF for current trout regulations, including size limits and daily bag limits that have been adjusted in recent years.
