Lakes / Alaska / Ketchikan Gateway County / Halfmoon Lake
Halfmoon Lake, Alaska
260 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Alaska
56.03 degrees N, 131.76 degrees W - Ketchikan Gateway 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 Halfmoon Lake Stacks Up
- Larger than 64% of the 2,450 lakes counted in Alaska.
- About 186 miles from Juneau, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Lake Rowena | Ketchikan Gateway | 3.9 mi | 157 acres |
| Lake Nellie | Ketchikan Gateway | 5.1 mi | 204 acres |
| Lake Shelokum | Ketchikan Gateway | 5.3 mi | 360 acres |
| Lake Bess | Ketchikan Gateway | 5.6 mi | 54 acres |
| Lake McDonald | Ketchikan Gateway | 5.6 mi | 1,027 acres |
| Lake Maude | Ketchikan Gateway | 6.1 mi | 142 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Halfmoon Lake
How Big Is Halfmoon Lake?
Halfmoon Lake covers 260 acres in Ketchikan Gateway County, Alaska.
What Is the Largest Lake in Ketchikan Gateway County?
Ella Lake is the largest lake in Ketchikan Gateway County, at 1,866 acres.
Largest Lakes in Alaska
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Iliamna Lake | Lake and Peninsula | 654,518 acres | - |
| 2 | Becharof Lake | Lake and Peninsula | 289,706 acres | - |
| 3 | Teshekpuk Lake | North Slope | 206,614 acres | - |
| 4 | Naknek Lake | Lake and Peninsula | 145,357 acres | - |
| 5 | Dall Lake | Bethel | 111,681 acres | - |
All 2,450 Alaska 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 120486783). Verified October 30, 2026.