Mermentau River
A slow coastal river in southwest Louisiana that drains through Acadia, Jefferson Davis, Vermilion and Cameron parishes, passing through Grand Lake on its way to the Gulf near Grand Chenier.
Course of the river, simplified. Map data from Natural Earth (public domain).
Weather at the Mermentau River (National Weather Service) ↗
River facts
| Length | 70 miles |
|---|---|
| Source | Junction of Bayou des Cannes and Bayou Plaquemine Brule, Acadia Parish, Louisiana |
| Mouth | Gulf of Mexico in Cameron Parish, Louisiana |
| State | Louisiana |
The Catfish Point Control Structure regulates outflow from Grand Lake.
Boat ramps, launches and bait shops
Detailed ramp, bait shop and lock-and-dam listings for the Mermentau River are coming soon. Until then, these searches open Google Maps along the river:
- Boat ramps on the Mermentau River in Louisiana ↗ · Bait shops near the Mermentau River in Louisiana ↗
Fishing regulations
Check the state agency for river-specific rules, seasons and limits before you fish:
Facts from Mermentau River (Wikipedia) ↗