Newest reservoirs in 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 23 articles we have published for Idaho lakes.Thinking about booking a Idaho lake vacation home rental, cabin or hotel?
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Below are lakes within USA > US West Region > Idaho > Compared by newest (youngest) reservoirs and the year it was completed. This list does not represent all lakes in Idaho, only the 23 Idaho lake articles we have published on the LakeLubbers website.
Lake name  |
Completion year |
Lake description |
|---|---|---|
| American Falls Reservoir, ID (Idaho, Southeastern Idaho, US West Region, USA) |
1978 | With more than 56,000 acres of water sport, boating and fishing waters, surrounded by choice camping and picnic areas, American Falls Reservoir in sou… |
| Priest Lake, ID (Idaho, Northern Idaho, US West Region, USA) |
1978 | Located in the most northern portion of Idaho’s Panhandle, Priest Lake is within 30 miles of the Canadian Border. Priest Lake was naturally created at… |
| Dworshak Reservoir, ID (Idaho, North Central Idaho, US West Region, USA) |
1972 | Dworshak Reservoir is an excellent outdoor recreation site with a great water playground of over 19,000 acres. Located in northern Idaho near the town… |
| 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… |
| Palisades Reservoir, ID/WY (Eastern Idaho, Idaho, Southwest Wyoming, US West Region, USA, Wyoming) |
1957 | Palisades Reservoir is set in southeast Idaho, east of Idaho Falls in a beautiful river valley. The southern end of the reservoir extends into Wyoming… |
| 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… |
| Lake Pend Oreille, ID (Idaho, Northern Idaho, US West Region, USA) |
1955 | Also known as Albeni Falls Dam Set in a valley carved by glaciers from Canada, Lake Pend Oreille (pond-a-RAY) is surrounded by mountains with altitudes exceeding 6,000 feet. Its 85,… |
| 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… |
| Island Park Reservoir (Eastern Idaho, Idaho, US West Region, USA) |
1939 | Just half an hour southwest of west Yellowstone, MT, Island Park Reservoir hosts a recreational paradise all its own. The roughly 7000-ace reservoir i… |
| 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… |