Newest reservoirs in Southwestern Idaho
The year that a reservoir was first filled to the reservoir’s normal elevation – or the year that a natural lake was first dammed – is the determining factor in the age of the body of water. A large reservoir can take more than a year to fill after its dam is first closed. You can find many of the the world’s newest reservoirs on LakeLubbers in the comparison table below. Many of the world’s oldest reservoirs appear on the last page of that list. Note: For some lakes, the completion year data is unknown, so you may see fewer lakes than the total 7 articles we have published for Southwestern Idaho lakes.Thinking about booking a Southwestern Idaho lake vacation home rental, cabin or hotel?
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Below are lakes within USA > US West Region > Idaho > Southwestern Idaho > Compared by newest (youngest) reservoirs and the year it was completed. 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  |
Completion year |
Lake description |
|---|---|---|
| Hells Canyon Reservoirs (Eastern Oregon, Idaho, Oregon, Southwestern Idaho, US West Region, USA) |
1959 | 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… |
| Lucky Peak Lake (Idaho, Southwestern Idaho, US West Region, USA) |
1955 | 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… |
| C. J. Strike Reservoir (Idaho, Southwestern Idaho, US West Region, USA) |
1952 | 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… |
| Anderson Ranch Reservoir (Idaho, Southwestern Idaho, US West Region, USA) |
1950 | 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… |
| Lake Cascade, ID (Idaho, Southwestern Idaho, US West Region, USA) |
1948 | 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… |
| Arrowrock Reservoir (Idaho, Southwestern Idaho, US West Region, USA) |
1937 | One in a string of three major reservoirs built to irrigate the parched Boise Valley, Arrowrock Reservoir has contributed to water recreation in south… |