Mobile Bay Delta Fishing: Redfish in the Backwaters
North America's Largest Inland Delta
The Mobile-Tensaw Delta sprawls across 260,000 acres of river swamp, marsh, and tidal bayous north of Mobile Bay. Five rivers converge here—the Mobile, Tensaw, Apalachee, Blakeley, and Spanish—creating a braided network of waterways that holds an astonishing variety of freshwater and saltwater species. Redfish push up into the delta from Mobile Bay, mixing with largemouth bass, striped bass, and catfish in one of the most ecologically diverse estuaries in the country.
Where Saltwater Meets Fresh
The salt line in the delta shifts with rainfall, tides, and wind direction. During dry periods in summer and fall, saltwater intrusion pushes reds well above I-65, sometimes as far north as the Causeway. After heavy spring rains, the salt line retreats south into the lower bay. Understanding this boundary is critical for finding Redfish in Mobile because the fish follow the salinity gradient.
Key Bayous and Creeks for Redfish
| Waterway | Access Point | Why It Produces | Best Tide |
|---|---|---|---|
| D'Olive Bay | Meaher State Park | Oyster reefs, grass edges | Incoming |
| Bayou Sara | Choccolatta Bay ramp | Shallow marsh, tailing reds | High incoming |
| Polecat Bay | Tensaw River access | Sheltered bay with mud flats | Falling |
| Blakeley River | Historic Blakeley Park | Deep channel bends hold reds | Any (current dependent) |
| Bay Minette Creek | North delta launches | Freshwater/salt mixing zone | Incoming |
The delta is a different world from the beaches. You can fish all day and never see another boat. The redfish in here aren't pressured like the ones in Perdido Bay or Wolf Bay—they'll eat a gold spoon thrown within 10 feet of them without spooking.
Seasonal Patterns in the Delta
Spring floods push redfish south into the lower delta and D'Olive Bay. As waters recede and salinity increases through summer, reds spread north into secondary bayous and creeks. Fall is prime time—cooling water concentrates bait in the river mouths, and redfish from 18 to 30 inches feed aggressively along marsh edges. Winter slows the bite but doesn't kill it; focus on deeper channel bends where reds hold in current breaks during cold snaps.
Speckled Trout in the Lower Delta
The lower delta where it opens into Mobile Bay holds Speckled Trout around Mobile from October through March. Points where bayous dump into the bay create current seams that trout ambush bait along. The Causeway pilings and the old railroad bridge remnants east of Meaher State Park are reliable winter trout spots. Live shrimp under a popping cork or a 1/4 oz jig head with a Cocahoe minnow-style plastic covers both approaches.
Navigating the Delta
- A shallow-draft bay boat or jon boat with a jack plate is ideal—many backwater channels run 2–3 feet deep at low tide
- Carry a push pole for the shallowest marsh areas
- GPS mapping (Navionics or C-Map) is essential—the delta is a labyrinth and landmarks repeat
- Cell service is unreliable deep in the delta; download offline maps
- Watch for submerged logs and stumps, especially after spring flooding rearranges debris
Public Launch Points
Meaher State Park off US-90 is the most convenient ramp for the central delta. The Bayou Sara ramp accesses the eastern marshes. For the upper delta, launch at the Tensaw River ramp off Highway 225. All ramps are free or require minimal state park admission. Full regulations for the delta are available at Outdoor Alabama.