Lakes / Maryland / Baltimore County / Prettyboy Reservoir
Prettyboy Reservoir, Maryland
1,508 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Maryland
39.64 degrees N, 76.75 degrees W - Baltimore 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 Prettyboy Reservoir Stacks Up
- Ranks #4 for surface area among the Maryland lakes counted so far - 1,508 acres.
- About 25 miles from Baltimore, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Loch Raven Reservoir | Baltimore | 16 mi | 2,200 acres |
| Liberty Lake | Carroll | 17 mi | 2,920 acres |
| Lake Roland | Baltimore | 18 mi | 98 acres |
| Piney Run Lake | Carroll | 21 mi | 281 acres |
| Lake Ashburton | Baltimore | 22 mi | 25 acres |
| Lake Montebello | Baltimore | 23 mi | 56 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Prettyboy Reservoir
How Big Is Prettyboy Reservoir?
Prettyboy Reservoir covers 1,508 acres in Baltimore County, Maryland.
What Is the Largest Lake in Baltimore County?
Loch Raven Reservoir is the largest lake in Baltimore County, at 2,200 acres.
Largest Lakes in Maryland
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Deep Creek Lake | Garrett | 3,679 acres | - |
| 2 | Liberty Lake | Carroll | 2,920 acres | - |
| 3 | Loch Raven Reservoir | Baltimore | 2,200 acres | - |
| 4 | Prettyboy Reservoir | Baltimore | 1,508 acres | - |
| 5 | Triadelphia Reservoir | Montgomery | 794 acres | - |
All 78 Maryland lakes ranked by surface area
Sources: USGS NHD (The National Map NHD MapServer layer 12) named waterbodies FTYPE 390/436; counties via Census point-in-polygon lake data (ID 125924138). Verified October 30, 2026.