Lakes / Idaho / Jefferson County / Rays Lake
Rays Lake, Idaho
597.9 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Idaho
43.91 degrees N, 112.27 degrees W - Jefferson 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 Rays Lake Stacks Up
- Larger than 84% of the 316 lakes counted in Idaho.
- About 31 miles from Idaho Falls, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Leavitz Pond | Jefferson | 1.1 mi | 212.23 acres |
| Two-way Pond | Jefferson | 1.3 mi | 64 acres |
| Sandhole Lake | Jefferson | 1.8 mi | 201.73 acres |
| Mud Lake | Jefferson | 6.8 mi | 3,117.73 acres |
| Roberts Slough | Jefferson | 16 mi | 91.95 acres |
| Butte Slough | Jefferson | 16 mi | 42.14 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Rays Lake
How Big Is Rays Lake?
Rays Lake covers 597.9 acres in Jefferson County, Idaho.
What Is the Largest Lake in Jefferson County?
Mud Lake is the largest lake in Jefferson County, at 3,117.73 acres.
Largest Lakes in Idaho
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Pend Oreille | Bonner | 92,764.44 acres | - |
| 2 | American Falls Reservoir | Power | 55,319.78 acres | - |
| 3 | Coeur d'Alene Lake | Kootenai | 26,891.64 acres | - |
| 4 | Lake Cascade | Valley | 25,043.4 acres | - |
| 5 | Priest Lake | Bonner | 23,425.59 acres | - |
All 316 Idaho lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 52381227). Verified October 30, 2026.