Lakes / Texas / Marion County / Lake O' the Pines
Lake O' the Pines, Texas
18,152.26 acres
Surface Area
49 ft
Max Depth
Where It Sits, and How Deep It Goes
Locator - Texas
32.80 degrees N, 94.61 degrees W - Marion County. State and county outlines drawn from Census boundary data; the lake marker is placed by its Texas Parks and Wildlife Department coordinates, not by eye. Schematic - not a survey map.
Depth Profile - Lake O' the Pines
Schematic cross-section drawn to one shared depth scale - not a survey or bathymetric map.
How Lake O' the Pines Stacks Up
- Deeper than 59% of the 107 natural Texas lakes ranked by depth.
- Larger than 98% of the 1,641 lakes counted in Texas.
- The largest lake in Marion County among those counted.
- About 127 miles from Dallas, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Johnson Creek Reservoir | Marion | 4.8 mi | 582.92 acres |
| Rhyne Lake | Cass | 5.7 mi | 39.78 acres |
| Simpson Lake | Cass | 6.5 mi | 204.6 acres |
| Lake Deerwood | Harrison | 6.6 mi | 32.37 acres |
| Barnes Creek Reservoir | Morris | 10 mi | 74.87 acres |
| Ellison Creek Reservoir | Morris | 12 mi | 1,361.3 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Lake O' the Pines
How Big Is Lake O' the Pines?
Lake O' the Pines covers 18,152.26 acres in Marion County, Texas.
How Deep Is Lake O' the Pines?
Lake O' the Pines reaches 49 ft at its deepest.
What Is the Largest Lake in Marion County?
Lake O' the Pines is the largest lake in Marion County, at 18,152.26 acres.
Deepest Natural Lakes in Texas
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Amistad Reservoir | Val Verde | 64,900 acres | 217 ft |
| 2 | Comanche Creek Reservoir | Pecos | 3,272 acres | 125 ft |
| 3 | Belton Lake | Bell | 12,385 acres | 124 ft |
| 4 | O. H. Ivie Reservoir | Concho | 19,149 acres | 119 ft |
| 5 | Stillhouse Hollow Lake | Bell | 6,429 acres | 107 ft |
All 107 Texas lakes ranked by depth
Largest Lakes in Texas
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Toledo Bend Reservoir | Sabine | 181,600 acres | 110 ft |
| 2 | Sam Rayburn Reservoir | San Augustine | 114,500 acres | 80 ft |
| 3 | Lake Livingston | San Jacinto | 90,000 acres | 77 ft |
| 4 | Falcon Reservoir | Zapata | 80,555.4 acres | - |
| 5 | Amistad Reservoir | Val Verde | 64,900 acres | 217 ft |
All 1,641 Texas lakes ranked by surface area
Sources: Texas Parks & Wildlife lake data (ID 109516127). Verified October 30, 2026.