Lakes / Mississippi / Smith County / Marathon Lake
Marathon Lake, Mississippi
41.55 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Mississippi
32.20 degrees N, 89.36 degrees W - Smith County. State and county outlines drawn from Census boundary data; the lake marker is placed by its USGS National Hydrography Dataset coordinates, not by eye. Schematic - not a survey map.
How Marathon Lake Stacks Up
- Larger than 33% of the 382 lakes counted in Mississippi.
- About 49 miles from Jackson, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Greentree Reservoir | Smith | 6.0 mi | 26.07 acres |
| Beaver Lake | Smith | 17 mi | 37.83 acres |
| Cooper Lake | Scott | 19 mi | 46.91 acres |
| Lake Claude Bennett | Jasper | 20 mi | 73.97 acres |
| County Pond | Newton | 20 mi | 26.38 acres |
| Shadow Lake | Scott | 21 mi | 114.86 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Marathon Lake
How Big Is Marathon Lake?
Marathon Lake covers 41.55 acres in Smith County, Mississippi.
What Is the Largest Lake in Smith County?
Lake Ross Barnett is the largest lake in Smith County, at 84.23 acres.
Largest Lakes in Mississippi
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Sardis Lake | Lafayette | 33,218.53 acres | - |
| 2 | Grenada Lake | Grenada | 16,988.3 acres | - |
| 3 | Arkabutla Lake | DeSoto | 11,389.45 acres | - |
| 4 | Enid Lake | Yalobusha | 6,290.32 acres | - |
| 5 | Bay Springs Lake | Tishomingo | 6,072.74 acres | - |
All 382 Mississippi lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 123501293). Verified October 30, 2026.