Largest lakes & reservoirs in Southwestern Idaho by acres
There is no widely-accepted minimum surface area that defines a lake. What LakeLubbers describes as a lake, you might call a pond. Acreage of a lake (or sometimes square kilometers) is most often measured at the top surface area when the lake is at normal elevation. The surface area can be considerably smaller or larger when lake levels are lower or higher than normal. North America’s Lake Superior is the world’s largest freshwater lake by this measure.The other measure of a lake’s size is the lake’s water volume. By that measure, the world’s largest freshwater lake is Lake Baikal in Siberia.
You can find many of the world’s largest lakes (acres) on LakeLubbers in the comparison table below. Note: For some lakes, "Largest Lakes - Acres" data is unknown or does not apply, so you may see fewer lakes than the total 7 articles we have published for Southwestern Idaho lakes.
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Below are lakes within USA > US West Region > Idaho > Southwestern Idaho > Compared by surface area in acres. This list does not represent all lakes in Southwestern Idaho, only the 7 Southwestern Idaho lake articles we have published on the LakeLubbers website.
Lake name  |
Surface area in acres |
Lake description |
|---|---|---|
| Lake Cascade, ID (Idaho, Southwestern Idaho, US West Region, USA) |
28,300 ac | Also known as Cascade Reservoir Lake Cascade (Cascade Reservoir) is the fourth largest lake in Idaho, creating an extensive and diverse recreation site for visitors. Its nearly 30,00… |
| Hells Canyon Reservoirs (Eastern Oregon, Idaho, Oregon, Southwestern Idaho, US West Region, USA) |
15,000 ac | Also known as Brownlee Reservoir, Oxbow Reservoir, Hells Canyon Reservoir The three Hells Canyon Reservoirs are one of southwest Idaho’s most scenic locations. Idaho can’t claim this national treasure alone, however as it sh… |
| C. J. Strike Reservoir (Idaho, Southwestern Idaho, US West Region, USA) |
7,500 ac | The C. J. Strike Reservoir in Southwestern Idaho offers a wealth of opportunities to enjoy nature. Formed in 1952 when a hydroelectric dam was built a… |
| Payette Lake, ID (Idaho, Southwestern Idaho, US West Region, USA) |
5,330 ac | Also known as Big Payette Lake One hundred miles north of Boise, nearly surrounded by Payette National Forest, lies breathtaking Payette Lake. Nestled beneath the peaks of the West… |
| Anderson Ranch Reservoir (Idaho, Southwestern Idaho, US West Region, USA) |
4,730 ac | One of the true gems of the Idaho reservoir system is Anderson Ranch Reservoir. Completed along the South Fork of the Boise River in 1950, this projec… |
| Arrowrock Reservoir (Idaho, Southwestern Idaho, US West Region, USA) |
3,141 ac | One in a string of three major reservoirs built to irrigate the parched Boise Valley, Arrowrock Reservoir has contributed to water recreation in south… |
| Lucky Peak Lake (Idaho, Southwestern Idaho, US West Region, USA) |
3,019 ac | Also known as Lucky Peak Reservoir Home of Idaho’s most visited state park, Lucky Peak Lake (sometimes called Lucky Peak Reservoir) covers over 3,000 acres just outside of the capital c… |