Lakes / Louisiana / Terrebonne County / Bay Long
Bay Long, Terrebonne County, Louisiana
659.21 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Louisiana
29.29 degrees N, 90.85 degrees W - Terrebonne County. State and county outlines drawn from Census boundary data; the lake marker is placed by its Louisiana Department of Wildlife and Fisheries coordinates, not by eye. Schematic - not a survey map.
How Bay Long Stacks Up
- Larger than 77% of the 664 lakes counted in Louisiana.
- About 66 miles from New Orleans, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Moncleuse Bay | Terrebonne | 3.4 mi | 3,595.49 acres |
| Mud Lake | Terrebonne | 3.6 mi | 1,784.11 acres |
| Treasure Bayou | Terrebonne | 3.8 mi | 547.32 acres |
| Caillou Lake | Terrebonne | 5.2 mi | 10,276.13 acres |
| Hackberry Lake | Terrebonne | 5.7 mi | 1,566.91 acres |
| Lake Mechant | Terrebonne | 6.9 mi | 11,176.68 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Bay Long
How Big Is Bay Long?
Bay Long covers 659.21 acres in Terrebonne County, Louisiana.
What Is the Largest Lake in Terrebonne County?
Lake Mechant is the largest lake in Terrebonne County, at 11,176.68 acres.
Deepest Natural Lakes in Louisiana
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | False River | Pointe Coupee | 3,212 acres | 65 ft |
| 2 | Vernon Lake | Vernon | 6 acres | 53 ft |
| 3 | Lake Concordia | Concordia | 1,026 acres | 50 ft |
| 4 | Caney Creek Reservoir | Jackson | 4,738 acres | 43 ft |
| 5 | Lake Providence | East Carroll | 1,380 acres | 37 ft |
All 27 Louisiana lakes ranked by depth
Largest Lakes in Louisiana
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Pontchartrain | Jefferson | 407,803.25 acres | - |
| 2 | Toledo Bend Reservoir | Sabine | 181,600 acres | 110 ft |
| 3 | Lake Maurepas | Livingston | 58,308.4 acres | - |
| 4 | Sabine Lake | Cameron | 56,867.74 acres | - |
| 5 | White Lake | Vermilion | 55,913.91 acres | - |
All 664 Louisiana lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID {571AF8A4-D1BD-4E06-9960-EC8933CCA906}). Verified October 30, 2026.